I have been using EVO for about 3 months for my 9yrs old 50lbs mix breed. First Chicken formula where she gained so much weight I decided to switch to reduced fat formula. I did see a great improvement in less shedding. I switched foods very slowly and am now on the reduced fat completely. In the last week she has become severely dehydrated and is drinking so much that she urinated in the house twice (hasn't done this in 8 years). She has also suffered from terrible upset bowels. I have her on rice now to calm the stomach but I am going to have to switch foods. Her symptoms are the same as the pom listed in a previous post.