I don't know about cheap, but I give natural balance loafs as treats. I just cut them in small pieces and keep them in a zip lock in the fridge. The large loaf is about $12 to $14, but last a while. My trainer has suggested I try hot dogs as training treats. I just bought some today, but haven't tried them yet.
We also have rice and lamb jerky treats we get at costco. I really large tub is only $12.00.
Riley - 11/05/2012-8/30/2013 (Myasthenia Gravis)
He will always be in my heart.