2904, 115 L.Ed.2 d 1067 (1991)(harboring a «dog commonly known as a
pit bull dog» is prima facie evidence of ownership of a vicious dog); City of Richardson v.
Responsible Dog
Owners of Texas, 794 S.W. 2d 17 (Tex. 1990); Greenwood v. North Salt Lake City, 817 P. 2d 816, 821 (Utah 1991)(
pit bull dogs «are known for a unique combination of strength, agility, tolerance for pain, ․ aggressiveness ․ were historically bred for fighting and killing, ․ have experienced a proportionately higher number of bites and attacks ․ [and] that Animal Control
treats pit bull dogs differently than other breeds»); American Dog
Owners Assoc. v. City of Yakima, 113 Wash. 2d 213, 217, 777 P. 2d 1046, 1048 (1989); Dog Federation of Wisconsin, Inc. v. City of South Milwaukee, 178 Wis. 2d 353, 367, 504 N.W. 2d 375, 381 (Wis.Ct.App.)