Because it isn't natural
Many rodents such as rats and mice are laboratory-bred hairless animals, deliberately bred so in order to facilitate various testing methods. If your rat is one of these, the hair will not grow back; it is a hairless breed. If your rat was born with hair and has lost it for some reason you will need to consult a vet, since its condition could lead to health problems for your pet.
i am not a rat artist but you can name it a Oreo rat
Rat poo
rat
The Brown Rat (Rattus norvegicus) has a larger body than the Black Rat (Rattus rattus)
The proper start to growing a human ear on a mouse's back is to first cut off a human ear. As highly qualified doctors, we would highly recommend you shave the rat beforehand for best quality hearing. Next, you are going to dip the ear in a pool of ear cells to make sure the ear functions properly on the rat's back. After, you are going to super glue and duct tape on to the rat's back and the rat's DNA should immediately respond to the new cells and work superbly.
A rat's teeth continue to grow.
Rat Sea Ear Nit Terrain
This depends on what is wrong with his ear. If there is a medical condition present, it is best to seek the advice of a veterinarian.
they never stop growing-like a rat's
a desert rat has a ear that has blood vessels so it can hear anything that might eat
becouse elephant's have big ear's and rat's are scared of water
It is written: ねずみ
Cancer contracted by a rat is not unlike cancers within humans. The life expectancy of a rat with cancer is dependent upon the type of cancer and whether or not it is a fast growing tumor or if it can be successfully removed.
It can be written: ねずみ
sat,mat,hat,rat,,spat,
no not often. Humans mutate and change but it takes millions of years. Scientists do studies in mutating like example= the rat with an ear on its back. that's pretty major but its abnormal that's not normal mutation