My dogs wear collars 24/7. In the house, when they're sleeping, out and about, all the time. I've never had any problems with them wearing collars. I have learned that Bayleigh needs hers tight or she'll chew it off. I'm just paranoid that if they don't have a collar and ID on, that they'll get loose and be gone. I see so many dogs in the newspaper that are lost without collars because they just got a bath or something. Also, if there happens to be a fight, I can easily grab their collars.