DOMESTIC DOGS Cowgirl and palomino horse (Equus caballus) in iris field with ranch dog. (090610-6834)Border collie meeting prairie dog. (Urban041)Cowgirl riding palomino horse (Equus caballus) in iris field with ranch dog. (090610-6799)Dog on a boat. (110509-1010242)Cowgirl and palomino horse (Equus caballus) in iris field with ranch dog. (090610-6852)Cowgirl and ranch dog herding horses (Equus caballus) in pasture. (090611-0200)Border collie and prairie dog pal. (Urban042)Cowgirl and palomino horse (Equus caballus) in iris field with ranch dog. (090610-6839)Cowgirl and palomino horse (Equus caballus) in field with ranch dog. (090611-0171)Cowgirl and palomino horse (Equus caballus) in field with ranch dog. (090610-6856) PHOTO LIBRARY MENUMENUBABY MAMMALSCARNIVORESHOOVED MAMMALSOTHER MAMMALS DinosaursDomestic CatsDomestic Dogs PRIMATESSMALL MAMMALS