He is a rescue dog that was never let out of the crate & was starved. He does both duties in his crate constantly & I am unsure of how to break him of this habit. All methods I know of do not really help due to his prior circumstances. He also eats it. We are trying to reward him for going outside so when he does his duty we give him a biscuit. This is the only time we give him biscuits. It does not appear to be working. Help!!!