I put my puppy (5 months old) into daycare for one day. I need to do this to get some work done and also because I will need a night in kennels in a couple of months, and thought this would be a good way to test how he might be & get him used to the people. The daycare said he was great, sent me photos and he seemed to love it. The plan is for him to go one day a week. However, I mentioned it in passing to his dog trainer who said they don't recommend it for any dogs as they pick up bad habits. Is it really that bad?