My 15 y.o. dog (a Puli) had lost about 20% of her body weight from one annual exam to another. I wanted to get some of that weight on her so started adding different things to her food. Basically forgetting that I already knew that high fat foods can cause pancreatitis. Sure enough, she got realy sick. I thought we were going to lose her. So two days at the vet and $1500 later she was feeling a lot better. But she was having none of the lowfat canned food the vet sent home with her. So I was adding some boiled chicken, broth, jarred baby food, nonfat cottage and on and on. And she was eating it but honestly it was a pain. So perhaps a week ago I made up a batch of food that had one cup each of coarsely chopped chicken, chicken broth (really just chicken flavored water), boiled potato and green peas. I started with just the chicken and half the broth in the FP and after getting them pretty mushy added the potato, peas and the rest of the broth. Blended til it was pale green throughout so I knew the peas were completely broken down. She scarfed it down! In our 15 years together, I've never seen her eat like this. I'm now adding a small amount of kibble and some cottage cheese. She gets a smaller amount in the morning cause she's never wanted all that much and a larger amount at dinner. And NOW she follows me into the kitchen every time I go wanting more :) So I give her another tablespoon or two for snacks. Will weigh her Monday and see what's happening. Other batches I've subbed rice for the potato and spinach for the peas. Loved 'em. Later today I'm going to try some broccoli and another batch I'll try subbing sweet potato for the potato/rice.
I'm sharing this in case any of the rest of you ever have to deal with something like this. I'll likely stick with the chicken as it's cheap and lowfat but would be interested in any other starches or vegetables that you've tried.