KMR - would it help post-surgical adult cat?

[Catty1]

Mom has started using a small spoon and getting food into Pyka.

A friend suggested KMR, and I hadn't even thought of it!

Pyka is getting watered AD formula (post surgical), and if we make the KMR double strength or strength and a half - what do you think?

Thanks!

ETA: Mom's vet said it is too high-fat and rich, and could cause diarrhea in Pyka.
So I am getting some Whiskas cat milk.

But would still like to hear any post-surgical-getting him to eat stuff!