I would guess that he's probably fine, but there's not way to be sure. You should take him to your vet as soon as you can, just for a general check up anyway, so it wouldn't be a bad idea to do that sooner rather than later.
But, I would bet he's probably just excited/nervous/scared/confused. He's in a new place, with new people, and that's bound to be scary. Pippa slobbers a lot if she's tense or excited, and he may or may not be housetrained, so accidents are probably going to happen. If he is housetrained, it can take a while to learn their signs that they need to go outside. He also might not eat right away. Being in a new or different place tends to make them not want to eat as much.
But congrats on adopting, I hope he settles in quickly!