I don't believe he'll need it on for 2 or 3 days, he should start using it with in a few hours once he gets the hang of actually using it.. you may have to help him by putting his foot in front of him, hold him for a while and see if he pushes himself up. If he does GREAT, this will be his therapy work out. do this little workout for about 10 maybe 15 minutes and then leave him in the bator for a few hours, you don't want him to get cold since he had another bath. after a few hours, do some more therapy work out.