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About a year ago, Chris and I decided to test some of the most popular mushroom supplements for dogs on the market with our little Shak. After several months of testing, we published our findings and to our surprise, it became one of the most-read articles we've shared in years. Since then, we've learned a lot. One of the biggest discoveries? Not all mushroom supplements are created equal. The type of mushrooms used, how they're extracted, and whether they contain fruiting bodies or inexpensive fillers can make a huge difference in how effective they actually are. Over the past six months, we've put even more products to the test, comparing leading mushroom powders, chews, tinctures, and blends from some of the biggest brands. After dozens of requests from our readers (follow us for future updates!), we're finally ready to share the results. Our updated guide is now live, featuring what we believe are the best mushroom supplements for dogs available today—based on ingredient quality, extraction methods, value for money, and, most importantly, the results we saw ourselves. Click the link below to see which supplements earned a spot on our list.