If you mean bathe, then every 2 months or so but if they are really dirty, then bathe them. If you mean grooming, then every day for long hairs, and once or twice a week for short hairs.
No, but they do have short hairs.
yes, but short hairs
To long or to short
They are generally short, and they do not shed
American short hairs.
Yes, all animals reproduce.
A koala is covered with short hairs (fur).
You can use a hair shampoo to wash tour hair and use a small scissors to get rid of the short hairs sticking out of your 5 day dreadlocks.
These short moving hairs are called cilia.