85Neutered cats may occasionally ejaculate due to residual testicular tissue left after surgery. During neutering, the vet removes most of the testicles, but small structures may remain. These can sometimes produce sperm later, leading to ejaculation. While not a common complication, it can occur. If your cat shows this behaviour post-neutering, consult your vet to assess if further treatment is needed.
Neutering, or castration, involves removing a male cat's testicles to prevent reproduction. The procedure typically eliminates testosterone production and sperm creation. However, in rare cases, remnants of testicular tissue may remain functional. This explains why some neutered cats might still display mating behaviours or ejaculate.
If you notice your neutered cat ejaculating, monitor for these signs:
- Small amounts of fluid during grooming or resting
- Continued mating behaviours like mounting
- No other health concerns like pain or swelling
Veterinary advice is recommended to rule out complications. Your vet may suggest:
- An ultrasound to check for remaining testicular tissue
- Hormone level testing
- Potential follow-up surgery if needed
This situation doesn't indicate failed neutering in most cases. The Cat Group, a UK veterinary organisation, confirms that complete testicular removal isn't always possible due to anatomical variations. Their guidelines state that occasional ejaculation post-neutering doesn't typically affect the cat's health or the procedure's effectiveness in preventing reproduction.

March 14, 2026
