The plentwarg diredog has split from the bearhog plentdog and moved into the South Tundra, where there were no predators. As the plants growing in the tundra were too tough for them to handle, they have become specialized as carnivores. Their skins have become very close to white to better camouflage themselves from their prey. The sails on their backs have become black and fused into a single sail due to a mutation. They can raise or lower this sail depending on whether it is basking in the sun or stalking prey. Their teeth and claws have sharpened to fit their new diet. They have also become slightly smaller than their ancestor to reduce their surface area and lose less heat.
The plentwarg diredog retains the olfactory glands in its mouth, but do not stick their tongues out as this causes them to lose too much body heat. They have instead developed a mechanism which sucks air through their teeth and carries the scent particles to the glands. They use their excellent sense of smell to track prey, find carrion and identify each other. Their sense of hearing is quite acute and also aids in hunting.
The plentwarg diredog will live in groups of between 6 and 14 individuals. They cooperate to take down prey which may be larger than themselves. These packs each have their own territory, but different packs will meet up during the mating season to interbreed. The plentwarg diredogs will mate, but will return to the pack which they came from. When a pack gets too big, it will split into halves. The two packs will split the territory up and try to expand the edges of the territory that border other territories. Their tails are still used for social interaction, but sticking the tail up now denotes friendliness.