rcon, I am not sure where you are getting your facts, but pretty much all dogs or canines work in packs. Domestic dogs don’t really count mainly because :
Domestic dogs (Canis lupus): Despite being genetically the same species as the grey wolf, it is unclear what the similarities are between the pack behaviour of the dog and the gray wolf. Domesticated dogs have had humans as part of dog social structure for at least 12,000 years, and human behaviour is not the same as wolf behaviour. Studies of dog behaviour include studies of dogs and their interactions with humans (example [6]), “dumped” or “road” dogs that were raised by humans and then left to fend for themselves (The Tuscany Dog Project[7]), feral dogs not attached to humans (Carolina Dog), and feral dog packs that live in association with human villages or camps (New Guinea Singing Dog). Pack structure and behaviour varies greatly.
But yeah dogs in general always live and work in packs, it is the very structure and fiber of their being, very few dogs go “lone wolf” so to speak and the ones that do often don’t last very long and usually do not go by choice. Dog’s are social animals this is why they prefer to be in packs, whether that pack includes humans or others dogs depends but yeah PACKS man, that is the way of life for a dog.