It's been two days now on 1/2cup Fromm Pork and Peas:3/4cup Purina. So far so good. They are absolutely loving it too! Both go straight to their food bowls and eat until its gone whereas they were just kind of going and eating a little and then finishing it later whenever they felt like it. I'll probably give them 1/2cup again this evening and if they continue not having any trouble I'll probably do 1/2 and 1/2 tomorrow.