One of the first kids I had was like this and the same age. I only had him part time due to his parents being shift workers and he'd moved around a lot of other providers (due to being a part timer, apparently). His behaviour improved at the end of a three day run as I was very strict about enforcing my daycare rules (manners and respect are very important here) but then he'd be off for two weeks and come back as a complete demon! After reading lots on here I decided to terminate quickly (after a moth) before his behaviour and rudeness spread to my own children and possibly jeopardized the other full timers I had. I had daily chats with the parents (as I do with all my parents re. their kids day and general behaviour etc.) and the mom was not surprised by anything I told her and wasn't willing to do anything to help with his behaviour. (They were paying for extra days they weren't using and I suggested he came to the daycare more regularly without such long breaks).