My little guy will be six months old Nov 25th. I don't think he has ever slept through the night yet! I've never had this issue with any other dogs in the past and I am not sure what I am doing wrong. He has to go to the bathroom.
We've tried feeding him earlier, later, taking him out before bed, taking him for a LONG walk before bed, feeding him more in the morning and a lighter meal in the evening and nothing works.
He wakes up between 3:30 and 5:30 every single morning to go out. 95% of the time he pees and poops. 5% he just pees.
We went to bed at 12:30am last night (this morning, I guess). He had dinner at 6pm. Water was picked up at 9pm. He went for a long walk at 7:30pm and pooped. He went out in the yard and peed multiple times. He went for a walk ten minutes before bed and peed. He got plenty of exercise between dinner and bed with walking and wrestling around for a long time with one of our other dogs and playing with us.
My head hit the pillow at 12:30am. At 3:30, he was whining. I tried to ignore him, but he started barking. I took him out and he pooped and peed three times! He was up again at 6am to pee and then again at 7am when we were up for good.
He has to go. If he didn't, I'd let him cry it out, but he always goes.
He is fine during the day. Doesn't go excessively or anything. While we are retired so able to let him out more frequently, he has stayed in his crate for 8 hours a few times without any accidents. I don't know what to do, but I would really like a solid seven hours of sleep for a change!
For an experimental change, I would eliminate any large amount of exercise and long walks between dinner and bedtime if I were you. Start slowing him down after dinner. Try smaller meals. Eliminate kibble and go for foods without grains. Tux's fiber comes from the pulverized bone meal in his food.
Dogs poop a lot if the food they are eating is not being utilized by their system. (In other words, kibble with fill that has little or no nutritional value). I agree with Marina Girl. Tux also eats small amounts of frozen or freeze dried raw food by Primal and raw goat milk. He eats 7:30, 10:30, 4:30, 7 PM, and 9 PM. He poops and pees once in the morning, and only pees at about 1 PM, 5 PM and 9 PM. When he was younger he would occasionally throw up a tiny amount of bile fluid in the morning, and the vet said to feed him before going to bed, hence the 9 PM dinner. He also takes a long drink of water before climbing in his bed. I leave water out always.
He has ALWAYS slept through the night (from 8 or 9 PM to 6:30 or 7 AM) and we would go outside at about 7 AM. When he was a puppy I would have to take him out every 45 minutes in the daytime. With every month of age, it seemed i could stretch out his potty times. I'm just guessing that by eating lightly but nutritious small meals, his urge/need to poop is reduced because there is less waste, and smaller amounts of food passing through his system. He seems to do better with this regimen. His poop is the size of a single green bean, almost no smell, dark and firm, and only once a day. The only time his digestive system went hyperactive, was when we gave him cow tails for chews. We stopped doing that.