Thank you all for answering. I didn't realize that Innova Evo was so hard on their systems. I thought I was doing the best thing, even tho they were both thriving on the Royal Canin I decided to try and give them what I believed, after reading posts on YT, to be the best food. I put them back on Royal Canin over the weekend and their poopy is going back to normal already. thanks again for the input. this forum is such a wonderful source of information and support. I only wish I had known about it with my last yorkie. He would have had a much healthier life if I had been better informed.