Rachel, I dont think you are being overly concerned. I totally agree with you, I would call the animal control. I think the laws differ from state to state and maybe even county to county, but especiall with a little puppy who will very very quickly get dehydrated even if what Carolyn says is scary true, that people dont concider a lot of things abuse, while we on here would. But with a puppy and heat adv. and possibly no water, not even to "not too concerned people" that could possibly be concidered okay.
I would call them if I were you. Can you imagine being in the yard with no water in that heat?!!!! Let alone leave your baby there. Poor puppy, It makes me both sad and mad to hear things like that, why ohhhh why do people get dogs when they dont want to take care of them.
Marit