If you have a bread machine, make a batch of your favorite wheat bread recipe, but substitute one cup of spent grain for one cup of flour. Watch it as it blends...you may have to add a little water or flour to get the right consistency.
Good stuff! I do this with every batch of beer now, the rest of the grain goes on the compost heap.
If you want to feed the birds just throw it out and they will eat. To make dog treats mix about 4 cups grain w/4 cup flour (or corn meal etc), 1 cup peanut butter and 1 egg. You can throw in parsley, ect. if you want to help with nasty dog breath. Bake for about 30 minutes @ 350 then for several hours @ 225 to really dry them out, that way you won't have to worry about mold when you store them. I heard also to not use grains that have hops becuase the hops are bad for dogs.
Bread -- yes. Dog treats -- yes. Bird feed -- no. I've put some spent grain out near my bird feeders. Never saw a bird or squirrel touch it. (And there were lots of both out there daily.) After several months, I had to clean it up & put it on the compost pile.
But I always save some in small ziplocs for making bread. And I make dog treats every second or third batch of homebrew.