Which breed of cat is known to be predisposed to mammary tumors?

Siamese cats are indeed recognized as being predisposed to mammary tumors. This breed has specific genetic and hormonal factors that increase their susceptibility to developing such tumors. In Siamese cats, early spaying is particularly important as it significantly reduces the likelihood of mammary tumor development.

While other breeds may also develop mammary tumors, the evidence indicates that Siamese cats show a higher incidence of this condition compared to the other breeds listed. Factors such as breed, age, and reproductive history play crucial roles in the likelihood of developing mammary tumors, but the genetic predisposition observed in Siamese cats makes this breed notably at risk.