I wouldn't think it'd be too great for a healthy dog to be on an RX food, but maybe that's just me?
Mikki is not a puppy, correct? I wonder why they are recommending puppy food?
Honestly, dogs get used to change. When Jackson got sick, I no longer could leave food down all day because he would eat it all up real quickly. Since then, he's on a schedule for the most part. I don't think Rosie would mind, so long as she's still getting the appropriate amount of food of course.