Why not add little furry guinea pigs into your minecraft world?
Guinea pigs spawn naturally in Savanna, Plains, Forest and Snow biomes. Each biome has a different type and colour piggy.
You can tame guinea pigs with hay stacks. Once you've tamed your guinea pig a option will pop up and then you can name your guinea pig. The more rare the guinea pig is, the more haystacks it will need to be tamed. Once you've tamed your piggy you can carry him on your head. You can also use a lead on your piggy.
You're guinea pig can be levelled up by giving him apples and carrots. Once your guinea pig is level 10 he / she will have the ability to heal all players. Any guinea pig can also be armored by giving him any type of boots. ( leather, iron, gold, diamond ) Guinea pigs attack only spiders, zombies and skeletons.
Guinea pigs can be bred by giving 2 adult guinea pigs a golden carrot each. The baby will then pop out. They will have a chance to have 2 - 4 babies.
Your guinea pig has a inventory. You can put up to 10 items inside. When you give a guinea pig a chest he's inventory will have up to 15 slots.
When your guinea pigs die there will be an cross. When you take a diamond and click on the cross your guinea pig will appear. Unfortunately all your guinea pigs level will be lost.
The Meaning of Life, the Universe, and Everything.
Neat idea for a mod, I've got to say. Nothing like another cute little mob to be running around the world!
The only thing I will say, is that you might be better off by continuing adding onto this system you're going to integrate to add even more animals. Perhaps maybe a totally new "More Pets" mod is awaiting construction from this post, bringing more critters beyond simply Guinea Pigs.
I would offer my help with the mod, but I'm, to say the least, not a coder. I do have ample experience working with sound, as well as a tad bit of experience with texturing if needed. Hope this mod takes off! I'll certainly be downloading.
Funny thing, a ways back there was in fact a guinea pig mod (back in beta I think, not much past 1.1). Eventually this mod morphed into a collection of strange mobs call "More Creeps and Weirdos", if you search for it then you will still find it (I just did). If you look down at the bottom of the mod list, you will see the little square piggies. I really want exactly zero of the other content, but leveled battle piggies sounds amazing. I was going to include it in my mod pack. I use JAS, so the normal MC pawn table is emptied at launch and then JAS rebuilds it based on the configs. I thought that I would only define the piggies in the spawn table and all of the other nonsense would be excluded, but it's actually not a forge mod. It's an old style mod that uses ModLoader and requires insertion into the Minecraft JAR. I didn't realize that this was still a thing, but the mod says it is for 1.8.1 and 1.7.10. If your curious it's really easy to find