I think they are probably wondering why the squirrel doesn't have a hat on ;) just kidding! They are probably like:Stella: Man I hate squirrels!Pickles: Yeah too bad we can't get to him....Stella: Hey go ring the bell and act like you have to potty...then we'll go out and get him!Pickles: Yeah Yeah!
Very likely scenario. If Stella does the same maneuver she did on the rat in the compost pile, I feel sorry for the squirrels she may encounter. Pickles is just a tag-along; she gets bored pretty quickly with the nature watching. :)