ok I never write reviews but I had to for this. My Lab started scratching constantly around 4 — paws were brown from licking, hot spots every few weeks, ears always smelled like yeast. She's 9 now. I thought this was just her life. Tried apoquel, switched foods twice, even did the expensive allergy testing. Nothing lasted more than a few weeks. Started adding this collagen to her food about a month ago and I can't believe the difference?? She's not scratching anymore. The hot spots are gone. Her paws are pink again for the first time in years. She actually sleeps through the night now — hasn't done that in forever. The liquid is so easy, she doesn't even notice it in her food.