thanks for your input Jen, I just talked with Marisa the vet and she said either would be fine, both are good and do what they need to,and price wise they are the same,I have decided to try Hills because they have a money back guarantee, so if lexie does not like it they will refund my money, as Marisa said there other others too i can choose from and it all comes down to what my lil girls tastes are.