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I am going to say something that nobody who owns a cat wants to hear and I don't give a f*k if it upsets you. Switching to a different brand of pate is not going to save your cat. Not Fancy Feast. Not Tiki Cat. Not Weruva. Not the $68 case of Hill's prescription your vet just recommended. NONE OF IT IS GOING TO WORK. I know because I tried ALL of it. Every brand. Every protein. Every texture. For two years. And my cat died anyway. Six years old. Kidney failure. Because I spent two years treating a food problem that was never a food problem. And the worst part? My other cat started doing the same thing. Same vomiting. Same perfect meat tubes. Same slow decline. And I almost let it happen again because I was still listening to the same garbage advice that killed my first cat. I'm done being polite about this. If your cat is vomiting and you're in here asking what brand to try next, you are wasting time your cat does not have. Read this entire post. Every word. Because the answer is in here and it is NOT another bag of cat food. My name is Anna Rodriguez. I'm 34. I live in Austin with my husband Marco and our two cats. Well, we used to have two cats. Loki was a 6-year-old Siamese. Vocal. Demanding. The kind of cat who'd sit on my laptop keyboard during Zoom calls just to remind me he existed. Simba is a 4-year-old Ragdoll. Quiet. Gentle. Follows me from room to room like a silent shadow. Two completely different cats. But they had the same problem. They both vomited. Every single day. For Loki, it started about two years ago. He'd eat his breakfast—dry kibble, Purina Pro Plan—and then 10 minutes later, there it was on the carpet. Undigested food. Perfectly formed. Like his stomach just gave up and said "nope." I asked my vet about it. "Try switching to wet food. Pate is easier to digest. The moisture helps." So I switched. Fancy Feast Classic Pate. Chicken flavor. For the first week, it seemed to work. Loki ate it. Kept it down. I thought: finally. Problem solved. Then the vomiting came back. Instead of vomiting 10 minutes after eating, he'd vomit 45 minutes to an hour later. And instead of kibble, it was these perfect tubes of meat. So I tried everything. Salmon. Turkey. Beef. Grain-free. Limited ingredient. Tiki Cat. Weruva. Reveal. I spent over $300 on different brands of pate in three months. Loki still vomited. And then Simba started doing it too. She'd been fine on dry food. No vomiting. No issues. But I'd switched her to pate too—thinking if Loki needed it, maybe she should be on it as a preventative measure. Within two weeks, Simba was vomiting too. Not every day like Loki. But 3-4 times a week. Same thing. Perfect meat tubes. 45-60 minutes after eating. I was cleaning up vomit every single day. In the morning before work. When I got home. Middle of the night when I'd hear that awful retching sound and jump out of bed to move them off the carpet. I was exhausted. But more than that, I was terrified. Because Loki was getting worse. His coat started looking dull. Greasy. He lost weight. I could feel his ribs when I pet him. He stopped playing. Stopped jumping on the counters. He'd just sleep all day on the couch. Barely moving. My baby was disappearing in front of me. I took him to the vet. "Has anything changed recently?" "I switched him to wet food about four months ago. Pate. Because he was vomiting on dry food." The vet nodded. "Sometimes it takes a while to find the right food. Let's try a prescription diet. Hill's i/d. It's formulated for sensitive stomachs." $68 for a case of 24 cans. Three weeks later, still vomiting. I called the vet, crying. "The prescription food isn't working. He's still throwing up. He's losing more weight. What do I do?" "Bring him in. Let's run some bloodwork." They took blood. Ran a full panel. Three days later, the vet called me at work. "Anna, Loki's kidney values are elevated. His creatinine is 3.8. His BUN is 72. He's in early kidney failure." I felt like the floor dropped out from under me. "What? How? He's only six years old." "Kidney disease can happen at any age. We need to get him on a renal diet immediately. Royal Canin Renal. It'll help slow the progression." I started Loki on the renal food that day. He refused to eat it. I tried warming it up. Mixing in his old food. Adding tuna juice. He'd take a few bites and walk away. I was sitting on the kitchen floor at 11 PM, crying, trying to hand-feed him with my fingers. "Please, Loki. Please just eat. You need this." He turned his head away. Over the next two weeks, Loki barely ate. He lost another pound. His ribs were showing. His eyes looked sunken. I was watching my child waste away. Then one night, I came home from work and found him lying in the corner of our bedroom. He was breathing weird. Shallow and fast. I picked him up. His body felt limp. I grabbed my keys and drove to the emergency vet. Forty-five minutes later, the vet came out. "Your cat's kidneys are functioning at less than 15%. He's in end-stage renal failure. His body is shutting down." I couldn't breathe. "Can you save him?" "We can try. IV fluids. Medications. But I need to be honest with you—at this stage, the prognosis isn't good." They kept him overnight. I went home and lay in bed, staring at the ceiling, unable to sleep. At 8:49 AM, my phone rang. "Anna, I'm so sorry. Loki passed about twenty minutes ago. We did everything we could." Marco drove me to the vet to pick up Loki's body. They handed me a cardboard box. I paid the bill. $3,200. We drove home in silence. For TWO YEARS, I watched Loki vomit. First on dry food. Then on pate. Then on every brand I tried. Then on prescription food. And everyone told me it was normal. "Some cats are just pukers." "Try a different protein." "Maybe he eats too fast." But it wasn't normal. His body was screaming for help. And by the time I understood what it meant, his kidneys were already destroyed. The worst part? Simba was doing the exact same thing. Vomiting 3-4 times a week on pate. Losing weight. Coat getting dull. I knew what was coming. Simba was going to die the same way Loki did. And I couldn't let that happen. I spent the next two weeks researching obsessively. I kept seeing the same pattern: Cat vomits on dry food → owner switches to pate → cat still vomits → owner tries different brands → nothing works → months pass → cat's coat gets dull → cat loses weight → bloodwork shows elevated kidney values → kidneys fail → cat dies. Then, buried in a Reddit thread at 2 AM, I found a comment that changed everything. "My cat vomited for three years. Tried every food. Finally tried taurine supplements. Vomiting stopped in four weeks." Taurine. I'd heard of it—it's in energy drinks. But I had no idea cats needed it. I immediately went on Amazon and bought a taurine supplement. $22. Great reviews. "Supports digestive health." I started giving it to Simba every day, mixed into her food. Week one: Still vomiting 3-4 times. Week two: Still vomiting. Week three: Still vomiting. Week four: I was sitting on my back porch, crying, watching Simba sleep in the sun. She'd lost another half pound. Her coat looked worse. I was watching the same thing happen all over again. My neighbor, Mrs. Williams, came outside to water her plants. Mrs. Williams is 73. She's a retired veterinarian. Used to run the city animal shelter for 30 years before she retired five years ago. She saw me crying and walked over. "Anna? Honey, what's wrong?" I told her everything. About Loki. About the vomiting. About the kidney failure. About how Simba was doing the same thing and I was terrified I was going to lose her too. "I found something online about taurine helping with vomiting," I said, showing her the Amazon bottle. "I've been giving it to her for four weeks but it's not working. She's still throwing up. I don't know what to do." Mrs. Williams took the bottle from my hand. Her face changed. "Oh, honey. This is garbage. No wonder it's not working." She sat down next to me. "Can I tell you something? Something I learned in 30 years of running a shelter? You were right. The vomiting is from taurine deficiency. But this supplement? This isn't real taurine. Or at least, not enough of it." She settled into her chair. "Cats can't make taurine on their own. They have to get it entirely from food. And taurine is what their liver needs to produce bile. Without bile, they can't digest fat. Especially the high fat in wet food like pate." "So the food just sits there?" "Exactly. It sits in their stomach, undigested, for 45-60 minutes. Then the stomach gives up and ejects it. That's why it comes up as a perfect meat tube." I thought of all those times cleaning up Loki's vomit. Perfect tubes of meat. "But the food says taurine added. My vet said Purina Pro Plan is complete and balanced." Mrs. Williams sighed. "That's the lie they tell you. Yes, the big pet food companies—Purina, Royal Canin, Hill's, all of them—they add taurine. But here's what they don't tell you: they add the absolute bare minimum amount required by law. Just enough to put 'complete and balanced' on the label and charge you premium prices." "So it's not enough?" "Not even close. And here's the kicker: even that tiny amount doesn't matter because the high-heat cooking process they use to make the food destroys most of the taurine anyway. What's left is basically useless." My stomach dropped. "So Loki was eating food with taurine in it, but..." "But his body wasn't getting any of it. And then—and this is the part that makes me furious—those grain-free formulas everyone recommends? They're even worse." "How?" "Because when they remove grains, they have to replace them with something cheap. So they use peas and lentils. Peas and lentils are cheap fillers that let them slap 'grain-free' on the bag and charge you an extra $20." "But aren't peas healthy?" "For humans? Sure. For cats? They're poison." She caught herself. "Not technically poison. But they contain compounds that bind to taurine in the digestive tract and prevent the cat's body from absorbing it. So even if there was enough taurine in the food—which there isn't—the cat's body can't absorb it because the legumes block it." I felt sick. "Loki was on grain-free Purina Pro Plan. For two years." "Then he was getting more taurine deficient with every meal. I'm sorry, honey. I know that's hard to hear." "So the food was killing him. The expensive food I thought was the best." "The vomiting was his body trying to tell you he couldn't digest it. His liver couldn't produce bile. So the food just sat there until he threw it up. But here's what's worse—when a cat can't digest their food properly, they can't absorb nutrients. So they're eating full meals every day, but their body is getting almost nothing. Their body starts breaking down muscle tissue for energy. Their organs start struggling. Their coat gets dull and greasy because their body is prioritizing survival. And their kidneys?" She paused. "The kidneys have to work overtime trying to filter out all the waste products from the undigested food and the muscle breakdown. Week after week. Month after month. Year after year. The kidneys are under constant stress. Until they start to fail." "That's what happened to Loki. For two years, his body was slowly starving even though his bowl was full. And his kidneys were desperately trying to keep up. Until they couldn't anymore." Mrs. Williams reached over and squeezed my hand. "You didn't know. How could you have known? The system is designed to keep you from knowing. These big pet food companies make billions convincing people their food is healthy while cats die from malnutrition." "But I tried to fix it. I bought taurine." She looked at the Amazon bottle again. "This brand? I tested it years ago when I was still at the shelter. Sent it to a lab. You know what we found? 194mg of actual taurine per scoop. Label claims 500mg. It's 61% underdosed. And the bioavailability—that's how much the body can actually absorb—was only 28%. So Simba isn't getting 500mg of taurine. She's getting maybe 54mg per day." "That's why it's not working. And every day you give her this garbage, her kidneys are getting closer to failing. Just like Loki's did." I started sobbing. "So what do I do? How do I save her?" Mrs. Williams stood up. "Wait here." She went into her house and came back a minute later with a bottle. "This is what we used at the shelter. KittySupps. Over my 30 years, I tested dozens of brands. Sent them to labs. Most of them were contaminated, underdosed, or degraded from poor storage. This is the only one that passed." "How is this different?" "503mg of pure taurine per scoop. Label says 500mg, so they actually over-deliver. 95-98% bioavailability, which means Simba's body can actually absorb it. Zero contamination. No fillers. Properly stored in pharmaceutical-grade containers to prevent degradation." "And this will stop the vomiting?" "If we're not too late—if her kidneys aren't too damaged yet—yes. One scoop per day, mixed into her food. Within 4-6 weeks, her liver should start producing bile again. The vomiting should stop. And her kidneys should stabilize." Mrs. Williams looked at me. "You can't oversupplement taurine. It's water-soluble. If she gets too much, her kidneys just filter it out and she pees it out. There's no toxicity risk. No side effects. No danger. And here's what I tell every cat owner: 99% of indoor cats are taurine deficient. Most owners have no idea because the symptoms develop so slowly that by the time you notice something is wrong, the damage is already done." "99%?" "99%. So even if you're not sure if your cat is deficient—even if they're not vomiting yet—there is literally no harm in giving them pharmaceutical-grade taurine. But if they are deficient, you could be saving their life." She handed me the bottle. "Start her on this today. And Anna? Don't blame yourself for Loki. The vet should have known. The pet food companies should be honest. But they're not. Because sick cats are more profitable than healthy ones." I started Simba on KittySupps that day. For the first few days, nothing changed. She still vomited 3-4 times a week. I was terrified it wasn't going to work. That I was too late. But then, around day 6, I noticed something. She only vomited twice that week instead of her usual 3-4 times. Week two: She vomited once. Week three: Zero vomits. I couldn't believe it. I kept waiting for it to come back. But it didn't. By week four, Simba hadn't vomited once. Her coat got shinier. Softer. She started grooming herself more. She gained weight. Not a lot, but enough that I couldn't feel her ribs anymore. She started playing again. Chasing her feather toy. Jumping on the cat tree. My child was coming back to me. I took her to the vet six weeks later for bloodwork. I was so scared. What if her kidneys were already failing? What if I was too late? The vet called me two days later. "Anna, I have good news. Simba's kidney values have improved. Her creatinine is 1.9, down from 2.4. Her BUN is 38, down from 48. Whatever you're doing, it's working." "It's taurine. Real pharmaceutical-grade taurine." There was a pause. "Well. Keep her on it. I've never seen kidney values improve like this." That was four months ago. Simba hasn't vomited once since week three. Her kidney values are stable. Her coat is beautiful. Her eyes are bright. She plays. She's happy. She's healthy. And I think about Loki every single day. For two years, his body was slowly starving even though his bowl was full. And his kidneys were desperately trying to keep up. Until they couldn't anymore. By the time the vet caught it, 85% of his kidney function was destroyed. Mrs. Williams told me it was preventable. All of it. If the pet food companies were honest about how little bioavailable taurine is actually in their food. If my vet had tested for taurine deficiency instead of just pushing more expensive prescription food. If anyone had told me that grain-free food with peas and lentils was making the deficiency worse. Loki would still be here. I'm writing this because I see so many of you posting the same things I posted two years ago. "Switched my cat to pate. Still vomiting. Tried chicken, salmon, turkey. Nothing works." "My cat throws up perfect meat tubes 45 minutes after eating. Vet says he's fine." "Spent $500 on vet bills. No answers." You're not doing anything wrong. The food isn't the problem. Your cat's liver can't produce bile because they're taurine deficient. And if you don't fix it, the same thing that happened to Loki might happen to your cat. Mrs. Williams told me: 99% of indoor cats on commercial food are taurine deficient. That means your cat is probably deficient right now. Even if they're not vomiting. Even if they seem fine. Because taurine deficiency happens slowly. Silently. Until the damage is done. There’s no toxicity risk, no side effects in giving taurine a try. So even if you're not sure if your cat is taurine deficient—even if they're not vomiting yet—there is literally no harm in giving them pharmaceutical-grade taurine. But if they are deficient, you could be saving their life. Start them on taurine today. I wasted four weeks giving Simba Amazon taurine. Four weeks where her kidney values got worse. Four weeks I'll never get back. Simba hasn't vomited in four months. Her kidney values improved. She's healthy and happy and alive. But Loki is gone. And I'll spend the rest of my life wishing I'd known sooner. Your cat is vomiting because they can't produce bile. They can't produce bile because they're taurine deficient. And commercial cat food - even the expensive pate, even the grain-free, even the prescription food your vet recommended—doesn't provide enough bioavailable taurine. You don't need to try another brand. You don't need to switch proteins again. You don't need to spend another $500 on vet bills for tests that won't find anything. You need to fix the taurine deficiency before their kidneys start to fail. 📢 EDIT: A lot of people messaged me saying they bought KittySupps and never received it, or when they did, their cat didn't improve like Simba did. I asked where they bought it and they said either "Amazon" or "Chewy." I always buy directly from their website. They have a direct warning about counterfeits and they ONLY sell from their website. I'm sorry—I forgot to add the link. Here it is: https://kittysupps.com/products/taurine P.S. The Amazon taurine I gave Simba for 4 weeks was 61% underdosed with 28% bioavailability. Her kidney values got WORSE while I was giving it to her. The vomiting continued. Her body was still failing. Four weeks on KittySupps and the vomiting stopped completely. Six weeks and her kidney values improved for the first time. Don't waste time on supplements that don't work. Your cat's kidneys can't wait. P.P.S. Loki vomited for 2 years before his kidneys failed. The vomiting wasn't "just vomiting"—it was the first warning sign his body was slowly starving and his kidneys were under constant stress. I thought I had time. I didn't. If your cat vomits twice a month or more, start pharmaceutical-grade taurine today: https://kittysupps.com/products/taurine