The most important is to clean and disinfect. You can use topical antibiotics as e.g. powders with a broad spectrum antibiotic but always first clean good without producing further damage. You can also drop some hydrogen peroxide of the type commonly used in wounds and if you prefer a natural approach, use apple vinegar.
The second step is to protect it. There are some medical micropowder sprays that cover the wound with a thin layer of a metallic looking film that will prevent further infection and stimulates healing.
A bruised tail bone will heal over time. There is no strategy for speeding healing of a bruise.
you heal it by getting porkchop and left clicking on it. you should see its tail go up if successful
No because it does not have a bone in its tail because that is how it is.
they coat their feathers wit the oil from a glad. it is near the tail to increase impermeability.
Like all other bones, it will heal in time.
Comets
The eagle is named Leuko and he is located on tail isle in the smaller western forest near the shop near the end of the tail.
The scene was shown at the end of episode 40.
They have a vent near the tail
Nothing. It will heal eventually, but it might be crooked; also, don't step on it again.
Possibly your dog was startled and did not expect you to touch it. Just like when you come up to someone and say BOO! or She has a sore or injury on her hind quarters. try petting her near her head and slowly move your hand down her back if she whines or moves when you touch closer to her tail she may be injured.
Give dog a shot of Jack Daniels and put a cast on the tail.