Oh how horrible. I can feel your pain. We lost our Calvin to a similar situation. One day he was fine, and the next day he was gone. He lost control of his upper body. All tests showed nothing wrong. The only way we would know was to do an autopsy, which was too expensive ($500) for us. I'm so sorry.
Trap-Neuter-Return (TNR) is a full management plan in which stray and feral cats already living outdoors in cities, towns, and rural areas are humanely trapped, then evaluated, vaccinated, and sterilized by veterinarians. Kittens and tame cats are adopted into good homes. Healthy adult cats too wild to be adopted are returned to their familiar habitat under the lifelong care of volunteers
Bookmarks