Since I saw a thread in here that offered a Rabies.Jason.. I was thinking that maybe along with the current methods of infection. And animal bite could possibly spread Rabies

I think you'll be pleased with the next update I'm working on :)

I love the plugin .. unfortuanelty it doesnt fit in with my server .. But I will keep tabs on it 

Any update on this? I'd also like to see a chance of disease from animals.

This is already implemented, within the disease file there is a setting titled Entities that cause infection on hit, you can set the entity that you want to transmit the disease and the chance. For example:

  "Entities that cause infection on hit": [
    {
      "Short prefab name": "boar",
      "Infection chance on hit (0-100)": 5.0
    }
  ],

This will make it so any boar animal has a 5% chance to infect you when you take damage from it. See the Helpful Links section in the plugin post to find the List of entities if you want to know the names of other entities.