Day 3 since my 5 month old kitten was spayed. She seemed to have recovered fine, was happy eating, drinking using litter tray and playing. Today she just seems very tired, is moving slow and not eating much. She has just been to the vets and temp slightly raised but vet wasn't concerned about signs of infection. Is this a normal stage of recovery ? Am wondering if she hurt herself over night so is just taking it easy. I have seen her eat and drink a little and use the litter tray in the last hour. Am feeling anxious.