Mango went to the vet this morning for her first series of shots. Since the shelter takes care of all that I didn't even have to go. The woman from the shelter picked her up, took her in and then brought her back to me. It only took about an hour. Anyway, she hasn't been herself since. She's a bit lethargic and won't eat. She'll attempt to play but doesn't seem to be able to muster up the energy. Is this a reaction to the shots? Should I worry, or will she be ok by tomorrow? I've never seen this before.