"I've been using this product for about seven days, and my cat has not thrown up since I started giving it to her. She has also been eating a lot more, and looks so much fuller and happier. I've been giving Daily Digest to her in the mornings with her food, and she doesn't seem to mind at all. She has always had a sensitive stomach, caused by both physical and emotional factors, I think (she's a bit crazy, as cats go!), and this is the first time she has not thrown up every couple/few days. The one downside is that she seems a bit constipated...but that could just be because she's been eating much more than normal and her stomach isn't used to it. Overall, no real downsides, and most importantly this powder is easy to give your cat."