Dog biscuits, I'll try and find the recipe I used.
Here is the recipe I use. I've modified it a bit from a common one that I found on line a couple years back.
4cups spent grain
2 Egg whites
1.5 cups Peanut Butter.
Mix it all up roll it out the best you can and then make shapes, rectangles whatever. I actually have a dogbone shaped cutter I use.
Bake at 350 for 20-30minutes, until firmed up.
They are ready to go. I store them frozen. But I have read of people then putting the treats in a 200F oven for several hours to really dry them out for storage.
Its a bit of an art to find the right ingredient ratios. Alot depends on the residual moisture in the grain. SO jsut work with it, don't be afraid to add water or more flour depending on the feel of the "dough".
Note: Just make sure not to get any hops in the grains (this typically shouldn't happen) because they are harmful to dogs.