I have a 5th month old beagle/hound puppy that sometimes does well with going potty outside and other times not so much. He understands that he needs to poop outside and will ask to be let out when he needs to but he doesn't do the same for pee. Is there anything I can do to help him? I've been taking him out every 2-3 hours or after a nap/food and giving him treats when he goes. Is there something else I could do?