Haemophilia B: Also called the “Xmas illness”, this condition is carried on the female line but only affects male cats. The situation is understood to crop up amongst British Shorthairs. I have a cat the vet stated could be a aspect British Blue. I have thought about acquiring DNA test. https://brooksjexqk.jaiblogs.com/55565918/new-step-by-step-map-for-british-shorthair-breed