Halfling Breeds

Halflings have been breeding dogs since deep antiquity, and their kinship with canine is strong to this day. Knowledge of canine husbandry, along with strong amounts of empathy and practical use, have allowed halflings to breed dogs unrivaled in the world. Indeed, the halflings have incorporated dogs into their lives and cultural in a way that mirrors that of humans and their horses, though softer. Also, unlike humans and dwarves, halflings do not use dogs as instruments of war (beyond their use as mounts). Halflings typically use specially bred as draft animals, hunting companions, mounts, etc. Halfling breed dogs can broadly be seen as being one of a three broad types:

Riding Dogs - Heavy, muscular dogs with strong backs and quick strides. +1 Hit Die. +2 Strength
Draft Dogs - Though they sometimes double as mounts or cart-driving pack animals for farmer masters, generally speaking these dogs are bred to be tireless and enthusiastic workers. +1 Hit Die. +2 Constitution
Hunting Dogs - Excellent senses and awareness allow halfling hunters to track and corner small game. +10 Scent, +2 Intelligence.