Breast cancer is rare in cats, but it’s serious when it happens with 80-90% being highly aggressive. Spaying before six months of age greatly reduces the risk of developing mammary cancer by 91%.
Pregnancy is a drain on the mother, repeated pregnancies even more so. It stresses her immune system, which makes her more vulnerable to infection and strains her organ function. Then there is the risk of pregnancy complications, giving birth, and nursing kittens, which make have a litter anything but a stroll in the park. It may be harder to find suitable pet parents for your kittens.
- Pyometra (Womb Infection)
Coming into heat is associated with high levels of oestrogen. Over the months and years, oestrogen weakens the womb lining making it vulnerable to infection. The end result in an entire female is a condition called pyometra where the womb fills with pus. In a worst-case scenario, the patient may suffer blood poisoning, organ failure, and death. Treatment requires urgent surgery to remove the infected womb at a time when she is already unwell.