The Bulldog shape is one of the most appreciated shape among smokers. It has a peculiar bowl: it is made of two truncated cones which meets about at 3/4 of the bowl. In this point the pipemaker is used to make two lines all around the bowl. We can also find Bulldog pipes which does not has the lines. The bowl is usually lightly canted, but it is true only on the very classic shape. The shank has a diamond section and the stem is taper in the original classic shape, but we can find several Bulldog with saddled mouthpiece. Army mount style is also quite common.
I've heard a lot of people discussing about the difference from a Bulldog and a Rhodesian. Someone say that a Bulldog has a diamond shank and the Rhodesian has a round one. I stay with the Castello theory: the Bulldog has a stacked bowl; the rhodesian has a squat and thicker bowl. Both can have a diamond or round shank and both could be lightly or full bent.

CONNECTED SHAPES

The Bulldog is also made in the Bent version with 1/16, 1/8, 1/4, 1/2 or full bent stem.

The Rhodesian could be considered a squat Bulldog. Both has the same characteristics.

The Rhodesian has a Bent version which could have 1/16, 1/8, 1/4, 1/2 or full bent stem.