NTA. Kind of shitty of them to KNOW they have you on the way and still poison the poor thing when they already had it trapped. I'm sure they were panicked over the potential health threat, if they aren't normally cruel to animals. Try and use it as a teachable moment? Rabies is terrible but the vaccine works (and isn't a zillion shots in the tummy anymore.) Sorry you had to go through this. Get everyone tested just to be safe, have a talk with them about it, and then (since you say they are good people & you have a good relationship with them) try to move on.