Better Than Wolves

A mod for Minecraft created by user Flower Child, that adds mechanical power to the game, which creates a wide variety of things ranging from elevators to pottery. oddly, only two things in the mod actually pertain to wolves (Dung and wolfchops). There is a wiki.

Tropes used in Better Than Wolves include:

Crossover: A co-op between Flower Child and Buildcraft creator Space Toad to create Better Than Buildcraft.
Difficult but Awesome: Refined Tools require a LOT of work to get, but are better than even diamond tools.
Epic Fail: Somehow, putting in 8 Soul Dust or Ground Netherrack without having an urn to dispense it in will spawn a cuddly new friend for you.
I'm A Wolfitarian: You can feed wolfchops to wolves. They will instantly turn hostile even if you've tamed them.
Self-Imposed Challenge: An option has been added that disables the use of buckets, called "Hardcore Bucket."
Soul Jar: Soul Urns. Also a partial case with Soulforged Steel, which requires Soul Urns to make.
Tech Tree: There are specified ages within the game, and you must make a certain item considered to be the "head" which unlocks the next age and allows you to craft more items. There's a full list here, with the ages listed here