Breathing with their mouths open is a way for dogs to cool off, it's their internal Air conditioning system.... :) So she's not necessarily thirsty, just hot & cooling her body off.
Congratulations on your new dog, it sounds like you two are meant for each other since you started wanting a puppy and then suddenly your friend needs to give up theirs... :) Can't wait to see pictures, she sounds adoreable! :) What's her name? Do you keep the old name or give her your own?
