Dogs are the first domestic animals to show up in your settlement. They are excellent guards and will help you fight any intruders.
Once the dog domestication technology has been obtained, dogs will arrive from time to time in your camp. They are the ally equivalent of the wolf predator.
Dogs are not very powerful, but they will help you fight the predators and raiders who attack your camp. You have absolutely nothing to do to support them, they do not need to eat and they drink at the river when they are thirsty.
Dogs have a life bar, a temperature bar, a hydration bar and a stamina bar. They are also affected by old age, just like your villagers.
Kill the dog
In a situation of famine, you can if necessary kill your dogs to feed the villagers. Each dog provides 1 raw meat.