Is this normal for a dog as they get older? He has been walked and been and then let out again before we go to bed. He doesn't whine or ask to go out again. Last night he crapped in the house. Once it had been cleared away he kept rapping on the stair gate for attention but he didn't want to go out or need anything else. He just wanted to be upstairs with us. Is this normal behaviour or do I need to see a vet?