With, perhaps, one or two exceptions, most members of the dog family are instantly recognisable as such. Ignoring the domestic breeds, they typically have muscular bodies, long legs, large, mobile, ears, heads that are broadly triangular in shape, and bushy tails.
Their legs are the shape they are because they're adapted to chasing prey, and most dogs are therefore pretty good at running. They have four toes on each of the hind feet, and, while most of them do have the full set of five on the front feet, the thumb (or "dewclaw") doesn't reach the ground. Their snout is the length and shape it is, partly to get in a large and sensitive nose, and partly to fit in an array of teeth that don't restrict them purely to eating meat.