honestly I never leave reviews but this one earned it. my Lab started scratching nonstop at about age 4 — her paws were stained brown from licking, hot spots came back every few weeks, and her ears always had that yeasty smell. she's 9 now and I'd assumed that was just her life. we tried apoquel, changed her food twice, even paid for the full allergy panel. nothing held for more than a couple weeks. I began mixing this collagen into her meals roughly a month ago and the change is hard to believe. the scratching stopped. the hot spots cleared up. her paws are pink again for the first time in years. she sleeps right through the night now — something she hadn't managed in ages. the liquid blends in so easily she doesn't even know it's there.