Rabbits "bathe" themselves with their tongues. (You might call this "grooming," "bathing," "washing," etc.) This means that with their tongues and their paws, they clean themselves: their fur, ears, eyes, nose, rear end, everything.
A rabbit that isn't keeping itself clean is not healthy. Maybe the rabbit is physically unable to keep itself clean, maybe it doesn't feel well enough to bathe, or maybe it is depressed. Whatever the cause, a dirty rabbit is a clear sign that something is wrong that needs to be fixed.
Veterinary treatment may be required, or maybe you just need to improve the rabbit's living conditions and lifestyle. Either way, a vet needs to give your rabbit a physical exam, at least to rule out injury and illness.
See the related questions below for more details and links.
rabbits lick themselves to wash
Rabbits should never be given baths. Getting a rabbits coat completely wet will ruin its fur. Rabbits are much like cats in that they bathe themselves.
To clean themselves or for enjoyment.
Baths can be dangerous for rabbits. Healthy rabbits, including outside ones, keep themselves clean and don't require baths. If your rabbit needs a bath, something is wrong -- either the rabbit is sick and needs a vet, or you should improve the rabbit's living conditions. If you need to bathe a rabbit, follow certain precautions to keep the rabbit safe. See the related question below about bathing rabbits for details and link -- it applies to outside rabbits as well.
Mini Rex rabbits, like all pet rabbits, bathe themselves by licking their fur. If your rabbit is dirty and needs a bath, something is wrong! See the related question below for more details (it applies to all pet rabbits, including Mini Rex rabbits).
No, it is not good for guineas or rabbits to get as wet as they would get in a shower. They bathe themselves with their tongues and don't need a shower in water. Taking them in the shower could make them sick or even kill them.
To them it's their way of life. It's not like they go home and and have built-in bathtubs. Rabbits don't bathe in dirt, really. Some animals take dirt baths, like sparrows for example. Rabbits make burrows in the dirt to live in, and they lie down in dirt on hot days because the dirt is cool, but they don't bathe in dirt. Rabbits groom by licking themselves and each other.
Koalas, like many mammals, bathe by licking themselves.
Lions bathe themselves in the same way domestic cats do. They either lick themselves clean or they lick each other clean.
No, they can groom themselves.
yes
Shouldn't be needed. they hate water & bathe themselves.