Can address cats specifically but my Male dog was so swollen he looked like he was still intact and he was very red. Wish I could send a picture. I emailed at 10pm and they called me back right away and followed up with an email when I didn't answer the phone. As it turned out the doctor that called back was right and everything settled in few days. She did offer to see him on Monday ( I called on Sunday night) and or call in medicine if I was still concerned.
My males that I had do still have their testicles, they do swell up some. Try to contact them or take them to an emergency vet. There's one in Huntersville and Hickory.
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