As a note, the dough was too crumbly to roll into one big sheet. It would have been very cracked. But the small balls worked well... so no complaints here!
2 cups of rice flour
1 cup peanut butter
1 cup milk
If you're interested in making your own pup treats, I suggest checking out this website. It looked like there was a lot of good information there. I especially like the thought of freezing low sodium chicken broth in cubes and bringing them outside on a hot summer day!