Reversible control of reproduction in tom cats: medical options for manipulating libido and fertility.

J Feline Med Surg. May 2023;25(5):1098612X231171406.

Lluis Ferré-Dolcet¹, Stefano Romagnoli²

¹ San Marco Veterinary Clinic and Laboratory, Padova, Italy.; ² Department of Animal Medicine, Production and Health, University of Padova, Italy.

Abstract

BACKGROUND:There has been a growing interest in alternatives to surgery for controlling reproduction in tom cats, and the resultant medical options add to a practitioner's toolbox when handling these cases in clinical practice. It is important, however, that when suggesting these drugs, veterinarians have a good understanding of their mode of action, and their correct use and dosage.

CLINICAL RELEVANCE:Breeders increasingly wish to be able to switch on/off the reproductive ability of their tom cats in a controlled manner. In addition, in small animal medicine, there has been concern from some academics, and a growing number of pet cat owners, about potential long-term effects of surgical sterilisation. Further, for some cats surgical castration may not be possible due to health conditions that mean anaesthesia is unsafe. In all of these scenarios, medical alternatives to surgery can prove useful.

EQUIPMENT AND TECHNICAL SKILLS:No special equipment or technical skills are required. A good knowledge of the medical alternatives to surgical sterilisation for controlling reproduction in a tom, and making sure the patient is a suitable candidate, are, however, important for ensuring the cat's health during and after treatment and the owner's satisfaction.

AUDIENCE:This review is aimed principally (but not exclusively) at veterinary practitioners working with cat breeders who seek a temporary arrest in their tom cat's reproduction. It may also help practitioners with clients who would like an alternative to surgery or with cats where anaesthesia for surgical castration is not possible.

EVIDENCE BASE:Advances in reproductive feline medicine have resulted in improved knowledge of medical contraception. This review draws on scientific evidence-based papers that report on the mode of action, length of efficacy and potential side effects of different methods of medical contraception, as well as the authors' own clinical experience.

Keywords

GnRH agonists; GnRH antagonists; Medical contraception; deslorelin; immunocontraception; melatonin; progestogens;

Article Tools:

Medline

Email to me

Archives Highlights:

Factors Associated with Medication Noncompliance in Dogs in New Zealand.
Medication noncompliance was recorded for 47% (71/151) of owners. Increasing dog age was associated with better owner compliance. Forty-seven percent (71/151) of owners reported that "nobody" showed them how to administer the medication. One-third of dog owners (47/151) reported challenges in medicating their pets. The most common reason cited by clients reporting challenges was a resistant pet.

The Most Common Environmental Risk Factors for Equine Asthma-A Narrative Review.
The symptoms of equine asthma are typical of respiratory inflammations, and they include coughing, nasal discharge, and breathing difficulty even at rest in horses with severe asthma. BALF and tracheal wash analyses are the most popular methods of diagnosing equine asthma. Inadequate housing conditions undoubtedly increase the risk of asthma.

'Transmission Tracker - Dirofilaria'- a public dashboard to assess in real-time the temperature-bounded transmissibility of canine heartworm across Australia.
'Transmission Tracker - Dirofilaria' processes near real-time temperature records across Australia and allows users to enquire about historical and current weather suitability for canine heartworm transmission at any Australian postcode of their interest. This information allows veterinarians to access when, and for how long, heartworm may be transmitted at a specific location, assess the associated risk of infection, and advise on a patient-dependent dirofilariosis prevention plan for their canine patients and guardians.

Investigating the Reasons behind Companion Animal Relinquishment: A Systematic Content Analysis of Shelter Records for Cats and Dogs, 2018-2023.
The most frequent reasons cited were Behavior Issues (28%), Housing/Moving (18%), Unable to Care (16%), Too Many Pets (10%), Financial (6%), and Owner Allergies (5%). The most common behavioral reasons reported were Aggression (32% of behavioral surrenders), Social Conflict (28%), and Soiling (13%).

Risk Factors for Injury in Border Collies Competing in Agility Competitions.
The jump height relative to the shoulder height was associated with injury, with dogs jumping noticeably above or below shoulder height more likely to report a history of injury. Other identified risk factors included the number of weekends spent competing/year, the number of competitions at the national level, the age when starting elbow height jumps and backside jumps, the acquisition of the dog from a breeder, and the age of the handler.