I feel like that pup does not like Josh. I've raised 3 pups and none tried to bite me when I held my hand out, then backed away when Josh went to pat him
Also, I get the feeling Steph is having a very hard time emotionally. While their house seems clean enough, there are piles and piles of things on every surface, in every corner. Clear indicator there's a hording issue.
This isn't even the kitchen which is worse:
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Nix the comment on clean: Steph was wiping up puppy pee by using a paper towel on the floor, stepping on it... she didn't sanitize the bottom of her foot, the floor or her hands after she picked the towel up and tossed it.