When should bitches be neutered?

Debate between vets on the timing of neutering of bitches

source: Veterinary Record vol 148 no 16, April 21 2001
starts p 491, 3 pages long

The BSAVA congress held in April 2001 has discussed neutering of bitches. University of Wiscosin's Dale Bjorling argues that pre-pubertal neutering can be safe. US animal shelters are concerned about large numbers of strays euthanased annually, and want neutering to be carried out at between eight and 16 weeks. Some studies following dogs in their first year indicate that this may be safe. Peter Holt, from Bristol University, England, in contrast, is more concerned about health risks from early spaying. He argues that incontinent bitches should not be spayed at under six months, since incontinence is often resolved when a bitch has had her first season. He also cites a study showing bitches were almost four times as likely to be incontinent ten years afterwards if they were spayed before their first season, compared with bitches spayed after their first season.

Some breeds, like Old English Sheepdogs and Dobermanns, are especially at risk from incontinence. Infantile vulva and juvenile vaginitis could also be problems for bitches spayed early. Data on the extent to which pre-pubertal spaying may reduce risks from mammary tumours are inconclusive, and further research is needed, he argues. Meanwhile, small animal specialist, David Coffey, opposes spaying, arguing that owners should control dogs, or not keep them.
DO,IN