Последствие нестерилизации. Пиометра.⁠⁠

Пожалуйста)

Конечно, можно. Правда, кастрация в таком возрасте уже не убережет от опухолей молочных желез. Но пиометры, маститов и ложняков не будет и на том хорошо.

А почему лучше, она не сказала? Просто я то смогу привести аргументы научных статей, почему лучше это делать до первой течки, а она?
Извините, они на английском, так что придется вам пропустить их через гугл-переводчик.
Третий пункт - там больше информация про собак, а кошки немного другие животные, но, по сути, верно, что после третьей течки кастрация уже не предотвратить опухоли молочных желез. Но если у вас не стоит эта задача, можете кастрировать в любом возрасте.

1.  Pediatric Spay and Neuter

Wild West Veterinary Conference 2015

Philip A. Bushby, DACVS, MS, DVM

Marcia Lane Endowed Chair of Humane Ethics and Animal Welfare, College of Veterinary Medicine, Mississippi State University, Starkville, MS, USA

A 2000 survey of spay/neuter veterinarians on pediatric spay/neuter, 85 veterinarians who had performed over 235,000 early spay/neuter surgeries collectively agreed that pediatric spays and castrations were easier and faster (less fat, less bleeding); less stressful on patient; and less stress on the veterinarian (once they were used to it). Additionally, pediatric patients recover more quickly and require less surgery time, with lower anesthesia risk, before 24 weeks of age. He emphasized gentle tissue handling, appropriate suturing, and proper handling of suspensory ligament. The smaller the patient, the greater the risk of hypoglycemia and hypothermia, so taking necessary precautions is important.

2. Feline Spay FAQ

Wendy C. Brooks, DVM, DABVP

The last 20 years has brought us a great deal of research into and experience with early spaying and there are many advantages of spaying well before age 6 months. Young kittens recover more quickly from spaying than older kittens and kittens spayed at young ages seem to have a reduced incidence of asthma later on. Obviously, accidental pregnancy is not an issue when the kitten is adopted already spayed. Spaying can be performed in kittens as early as 8 weeks; however, my hospital finds such tiny tissues difficult to manipulate and I like to wait to spay our female patients until they weigh at least 3.5 to 4 pounds.

3. The Spay/Neuter Controversy

OVMA 2016

John Berg, DVM, DACVS

Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA

Prevention of Mammary Cancer

Other than population control, the most important reason to recommend spaying of female dogs is prevention of mammary cancer. In dogs, based on research conducted in California in the early 1960s, there is a correlation between the number of estrus cycles prior to spaying and the risk of mammary cancer:
In cats, a recent study (Overly 2006) demonstrated a 91% reduction in mammary cancer risk in cats spayed prior to 6 months, and an 86% reduction in risk in cats spayed prior to 1 year. The above data suggest that the greatest benefit of spaying occurs if it is performed very early in life, so that ovarian hormones are not present during puberty, when the majority of mammary development occurs. Although recent publications have called the methodology of the 1960s research into question (Beuavais 2012), the incidence of mammary cancer appears to be dramatically higher in European countries in which dog populations are predominantly sexually intact (Norway, Denmark, Italy). In these countries, mammary tumors account for 50–70% of all tumors; meanwhile, mammary cancer is relatively uncommon in the U.S., where the majority of female dogs and cats are spayed. While the early studies need to be repeated, my personal bias is that the preponderance of the evidence suggests that an intact neuter status is a strong risk factor for mammary cancer.

Если вам не мешает запах мочи некастрированного кота, можете оставить)