So today I brought my female, indoor-outdoor cat outside. It is a nice day with the humidity being low and the temperature around 80 so I figure her and her, 2 month old, kitten would enjoy it. She seemed fine at first running around and enjoying the sun, but then I noticed that she was panting. She would start panting with her mouth wide open and at one point she had also puffed up her tail. She was just at the vet and they said everything was fine with no issues they could find. Is she just overwhelmed or too hot or is it something else? I really don't want to have to keep spending a lot of money on unnecessary trips to the vet but I also want to make sure she is alright. Has anyone had this happen to their cat and could possibly tell me a solution?