I think it sucks that you're losing a family, but I wouldn't share that information with my daycare provider until someone actually purchased my home, either. I'd be worried that they'd drop me from care before I could find another in my new neighbourhood. Honestly, I can see both sides of this, and this is why most of us have a "giving notice" portion of our contract. It'd be nice if a family could give us as much notice as possible before leaving our daycare, but really, if I ask for 2 weeks' notice, I can't be upset when I get two weeks' notice.