Hybrid Chihuahuas tend to be healthier and friendlier than the purebreds. (Avoid illness due to extreme inbreeding). These puppies are 3/4 chihuahua 1/4 jack russell. The mother is half chihuahua, half jack russell. The dad is a long haired chihuahua. These women are well interacted socially with humans and other dogs. They even enjoy playing with my yellow lab! The white puppies have long hair, and the black one has short.