The heartworm/flea medication is a monthly fee btw, and also I'd second looking around if they said a dog couldn't be left around for more than 2 hours unless it had behavioral problems. The shelter I went to did understand that I worked and did the best they could to make sure I understood that grommet might have an accident the first few days (she didn't). Another shelter did say it would be at my own risk if I got one dog (behavioral issues) as the dog had done 1000 dollars of damage. At least the shelters I've been to seem to warn you what the risks are, the rescue groups I've talked to seem to be very selective and most were not good at responding in a timely manner, I understand that they're volunteer run, but at least they could send you a 'thanks for your interest, we're terribly busy but will try to get back to you in 2 weeks'
jt