Monee, Illinois. Breeder of Quality Tibetan Mastiffs. Here at Citadel Tibetan Mastiffs we are committed to quality selective breeding with health and temperament as our primary goal, followed immediately by beauty and correct breed type. Every precaution has been taken to attempt to eradicate CHD (canine hip dysplasia) from our breeding lines. Both parents of the puppy have been radiographed for dysplasia and have been undergone health checks by their veterinarian prior to breeding.