Poodle throughout, although most AKC-registered show dogs have a lion-cut or other, similarly shaven look. The sizes of the official AKC-recognized Poodle breeds are determined by height, not by weight. Poodles are bred in a variety of sizes, distinguished by adult shoulder (withers) height. The exact height cutoffs among the varieties vary slightly from country to country. The Fédération Cynologique Internationale (FCI) recognizes four sizes of one breed: standard, medium, miniature, and toy. Non-FCI kennel clubs generally recognize three sizes, standard, miniature, and toy, sometimes as sizes of the same breed and sometimes as separate breeds. Only the FCI describes a
Mexican Hairless Dog breeds. A spacious, well-fenced, and safe physical environment is desirable for this breed. Daily walks are ideal for exercising most toy-sized Xolos, however more stimulating physical and mental exercise is advised for larger and more active individuals. Behavior problems in Xolos are typically a result of a dog receiving inadequate or inconsistent supervision, as well as inadequate exercise and mental stimulation. The Xoloitzcuintli is a social dog that should not, in most cases, be an "only dog". It does not do well when kept as an outside-only dog. This is a breed that is at its best when it is