Felis ISSN 2398-2950

Determination of neutering status in queens and toms

Contributor(s): Autumn P Davidson, David Godfrey


  • To evaluate the need for neutering when the sterilization status of animal is unknown.
  • To reduce undesired and unintentional breedings.
  • Physical findings are only reliable when two scrotal testes are found or when obvious signs of estrus are present.
  • Stray/feral cats traditionally have an ear tip amputated by the operating veterinary surgeon as an indication that they have been neutered; however if behavior supports the presence of gonads or their remnant, evaluation is warranted.
Print out owner factsheet All about neutering All about neutering to give to your client.


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Further Reading


Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Place N J, Hansen J L, Cheraskin S L et al (2011) Measurement of serum anti-Müllerian hormone concentration in female dogs and cat before and after ovariohysterectomy. J Vet Diagn Invest 23 (3), 524-7 PubMed.
  • Davidson A P, Baker T W (2009) Reproductive ultrasound of the bitch and queen. Top Companion Anim Med 24 (2), 55-63 PubMed.
  • Davidson A P, Baker T W (2009) Reproductive ultrasound of the dog and tom. Top Campanion Anim Med 24 (2), 64-70 PubMed.