I learned a year or so ago that many overweight dogs will eat green beans. Substituting generous amounts of them in your dog's bowl for higher-calorie ingredients is a way to fill him/her up without adding fat.
I used canned green beans (whatever "cut" is cheaper). If I can get "no salt" green beans economically, I use them; otherwise, I just rinse whatever kind I have.
I prepare several days worth at a time, and I use a stick blender to puree them slightly. I have also used a potato masher successfully.
I started my mini Rat Terrier, Sarge, on a teaspoon a day, and gradually went up until he overcame his suspicion of them. He is now eating over 1/2 cup per day, and "loving" them. When I am opening the cans and pureeing his "gee-bees" (that's what we call them so the little brainiac won't know they're vegetables), he is begging for them.
I think Sarge would have lost some weight by now if I hadn't been sharing portions of my snacks with him. Unfortunately, we have both gained, but that's my fault.
By Jayni from Richmond, TX