Last night my cat broke out if the house. She was gone all night. It rained so she was not happy this morning when she reappeared. She ran in and are and acted fine. After work today she was acting lathargic, she felt warm, and when I touched her she acted like she was in pain. I rushed her to the vet in a panic, at the vet she acted fine. He determined age was not hurt but she does have a fever. He said sometimes cats get fevers from unknown origins. Now she is home and hiding and clearly fdoesn't feewell. The vet have her her fluids. My question is has anyone had a cat get a fever from stress or do you think she is sick. my vet just said lets wait and see. They took a urine sample so they will call tomorrow with urine analysis and we will follow up with blood work if fever persists.