The Bernese Mountain is a passive mob in the Copious Dogs mod. It is found in mountain biomes. It will attack mobs that attack the player. Bernese Mountain Dogs have a glitch, sometimes they will appear as a white rectangle in-game.
Taming in the Copious Dogs Mod is very similar to the way wolfs are tamed, the biggest difference is that you use a dog biscuit instead of a bone. Once the dog is tamed it will not follow you directly. You have to give it a collar, and after that, use a leash on it.
The bernese mountains must have a distance smaller than 15 blocks between them. When the requirements are met, just feed them both a cookie and let the magic happen.
When a bernese mountain loses health, you can not feed it directly. You have to place down a dog dish and fill it. When there is enough food in a nearby dog dish, the bernese mountain will come over and start eating. It will only eat if there is enough food in a dog dish to heal it completely.