We live in a three floor house with the living area on the first floor. Up to 3 months old we carried our cocker spaniel puppy up and down the stairs for playtime and toileting. At 14 weeks he learnt how to go up and down them himself. I have recently read that puppies shouldn’t be allowed to use stairs until 6 months old. Our puppy is now 17 weeks and weighs 8.5 kg so to carry him up and down multiple times a day would be difficult. He is very boisterous and as soon as the door is open he is off down the stairs, the same coming in the front door as soon as his lead is off he is up the stairs. Should we still be carrying him?