Dogs just doing it big per usual.  Your boy can’t figure out how to walk down steps?  No problem.  Encourage him, show him how to do it, be there for him.  That’s what dogs do.   Always there when you need a helping hand. That’s what love is about.  What do you think a cat would have done in this situation?   Probably would have pretended to help him and then pushed him down the stairs so he shattered all four legs and could never walk again and then robbed him blind and stolen his wrist watch while he laid motionless on the ground.