When Comet walks up to Danny after Denise brings him into the house at the end of the episode, his nose is next to the counter. In the next shot, Comet's nose is away from the counter.
Danny says to the guy who wants to buy the house, "there has never been nor will there ever be bugs, varmints, or pests of any kind in this house." In season 1 when Jesse was a pest control specialist he found a ferret in the basement/garage.
Nicky and Alex are not with the rest of the family when they return home from the restaurant.