Dog food for fish

[Oliverian]

I know this may sound a little crazy to some of you, but I want to know if fish can do well on ground-up dog food. It has a lot of good nutrients in it, so does anyone know if it would sustain fish? The problem is that I have fish-eating snakes, and I have quite a few feeder goldfish that I raise up to the right size and then feed to the snakes. They need to eat a lot to be able to grow quickly, and fish food is getting quite expensive. I could buy a big bag of dog food for the price of two or three small containers of fish food. Does anyone know if this will work? I know goldfish eat a wide variety. Thanks for any input. ~TR~