I took Salem and Spook to their first vet visit today. They did great together in the carrier and did well with the vet. She gave them each a FELV? shot and trimmed their nails. Now, this was at 1045am. I brought them home and they slept. Here we are at 6pm and they have only gotten up to eat and go potty. They are not playing which is strange to me. Is something wrong do you think?????