Glycogen Storage Disease Type IV in Norwegian Forest Cats

Norwegian Forest cats are known to be predisposed to developing Glycogen Storage Disease Type IV as it is a genetically inherited disease passed down from their parents. As I understand it, if both parents carry the genetic mutation which causes the disease, the offspring have a 25% chance of being affected. If one parent doesn't have the disease but the other is a carrier the resultant offspring will not be affected but will have a 50% chance of being a carrier. Healthy NFC kittens. Image credit as stated. The disease affects other animals such as horses. In horses, the frequency of the diseases 8.3% in Quarter Horses and 7.1% in Paint Horses. I could not find the level of prevalence of this disease in Norwegian Forest Cats. However, it is a known inherited disease as mentioned. Another term for Glycogen Storage Disease Type IV is "glycogen branching enzyme deficiency". This is because the affected individuals lack the enzyme necessary to store glycogen in its branched f