Poe, the white stuffed dog in the shot, has a battery-powered "heart" that mimics a pulse. It's to help puppies feel less alone at night as they get used to not having their litter-mates around them. Poe's "heart" stopped beating a few weeks ago. I replaced the batteries earlier, but instead of being happy, Ruby Mae seems to be determined to take Poe out. Apparently in her mind he's now a zombie who must be destroyed. Or something.
UPDATE: In other news, Ruby Mae has Kennel Cough. It seems the vaccination she received last Friday came a little too late. She'd already picked it up from one of the other dogs at the daycamp. Ruby Mae went into the vet's yesterday afternoon and is now on medication and a three week quarantine from further puppy interaction - apparently it's highly contagious. She's doing okay, just a little tired and unhappy.