TVHR - A New Solution?

TVHR - A New Solution?
October 23, 2016 by Modern Cat Magazine

As cat lovers, we at Modern Cat advocate for TNR as the humane way to care for feral cat colonies. But is there possibly a better way? The Journal of the American Veterinary Medical Association compared three methods of feral colony control: trap-neuter-return (TNR), trap-vasectomy-hysterectomy-return (TVHR), or euthanasia. The result? Researchers found that TVHR meant that fewer cats needed to be trapped and treated for colony elimination compared to TNR (only 35%, compared to 82% for TNR). Although the study still found TNR to be an effective strategy for colony management, researchers theorized that TVHR is more effective. Why? The idea is that when male cats are not neutered, but just rendered infertile, they can retain their role as the dominant cat in the colony, and thus are not replaced by an unneutered male. (A vasectomy leaves the testicles intact, meaning that hormone production is not affected.)

A downside is that when the cat's hormone production is left intact, some of the benefits of neutering are lost, like a reduction in cat fighting, spraying and aggression. It's clear that there is no cure-all to the challenge of feral cats; further research seems to be needed to find an effective and compassionate solution.

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Comments (2)

<p>This article should make it clear that this other program is geared towards controlling the behaviors as well as the population.&nbsp; I just don&#39;t want someone misintepretting the information as TNR is not good at controlling population, when it fact it is.&nbsp; But I see the point of the TVHR program.&nbsp; TNR I would imagine is much more cost effective and faster healing time.</p>
Thu, 08/22/2013 - 10:01
I actually think one of the main takeaways of the article is, in fact, that TNR may not be that good at controlling populations on a large scale. The study indicates that >57% of the population would have to be neutered for TNR to have any effect on population size, versus 35% for TNVR.

The healing times should be comparable between the two procedures, although the surgical technique for vasectomies is more involved than a feline neuter.
Sun, 10/20/2013 - 10:52

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