I think @Flint refers to whether the male dog (top) penetrates his partner or whether the male dog (bottom) is penetrated by someone else.What is a top and bottom dog exactly?
Physical position.What is a top and bottom dog exactly?
Anal sex in fact almost never happens naturally, when it does it is usually by mistake. Only a few animals were observed intentionally putting something up their anus for probably pleasurable intentions non of which were dogs. So all dogs are naturally tops. Some individuals may tolerate anal sex but it is more rare than common.do most male dogs specifically top or bottom?