Feel free to change breed names; most of these are just stand-ins due to a lack of specific world locations.
- Ghosthounds. Bred to sniff out ethereal undead. Seeking drive is triggered by the presence of ectoplasm. Sometimes trained alongside tracker dogs to find the source of the spirit's former body.
- Shift Trackers. Bred to detect shapechangers. They rely on the scent of mimics and body snatchers to detect their targets, resulting in a culture of heavily perfumed doppelgangers.
- Trollhounds. Bred to attack giants, trolls, orcs, and other brutish monsters. Large dogs, similar to Tibetan mastiffs. Variant breeds for hunting or fighting owlbears, yetis etc.
- Mongrel Trollhounds. Named mongrels due to the experimental introduction of troll blood into their bloodline. Makes the resulting dogs tougher and gives them minor regenerative properties at the cost of hairlessness and unpredictable behaviour.
- Familiar Friend. Small toy-dogs bred specifically to act as familiars. Smart and obedient, but heavily dependent on their owners for validation and company.
- Droopy. A breed raised near Shadowfell breaches. Look like grey basset hounds - a common myth is that their skin sags because there's nothing under it but bones and sadness. Often crossbred with ghosthounds.
- Steed-hounds. Gnomes and halflings have perfected the breeding of dogs as beasts of burden. These dogs are often docile to the point of tolerating almost anything, making them good family pets if they can continue to be put to work.
- Pixie dogs. A small, furry breed kept as a companion. Believed by some to have the passive ability to charm those in their presence, resulting in them being treated more like children or idols than dogs.
- Magicanine. Dogs that are exposed to magical energies at birth, resulting in shifts to their physiology. Treat as a regular dog with access to one or more of the following druidcraft, mage hand, prestidigitation, thaumaturgy.
- False Magicanine. A regular dog painted different colours to look like a magical dog. Especially cunning conmen may use magic of their own to make the dog glow, levitate, breathe fire etc.
- All Seeing Eye Dog. Can only see the future in greyscale.
- Veteran-hound. A theraputic breed to help barbarians that wish to let go of their rage. Their senses are highly attunded to their masters' anxiety and tension, allowing them to comfort or distract them before the rage takes over.
For more dogs, check out this reddit post.