I have a new 12-week old lab puppy who is having some housebreaking issues. At weeks 10 and 11 he was sleeping through the night fine and waking up at about 6 to eat and go the bathroom. Over the past two weeks he gets up at 1am, 3am, and then again at 6am. When we let him out at 1am and 3am, he goes poop and pees and then comes back in and falls back asleep. I was just wondering any tips to not have him going so much in the night. I feed him at 6:30pm since he got his last set of shots, he goes to the dog park and runs around w/ the other guys for at least an hour. He comes back exhausted, but normally still hasn't gone poop since his dinner. Any advice? I just don't want to get behind on training. I'm reading books, but this is my first lab!

I would make sure he moves around some his last trip out to stimulate him into eliminating. Take the water dish up about 7 PM. May need to close the lid of the toilet too.

That almost sounds way too frequent. Perhaps he needs checked for a bladder infection.