Info on Tibetan Mastiff dog.
Tibetan Mastiff dog picture set
Many breeds originate from a small number of animals, which leads to mating in kinship. The effect is several hereditary (genetic) diseases which are common in a few breeds, for instance, hip dysplasia (especially in German shepherds), epilepsy, ataxia, oculoskeletal dysplasia, among others.
Source of your dog
The canines can be split into crossbreeds and breeds with a new pedigree and a new breed without a pedigree.
Non-dog breeds (hybrids): they’re the result of an unintended mating (crossing) of different breeds of dogs or dogs whose supply is unknown.