The most common reason for missing fur on the tail is over-grooming by it's cagemates. The best way to prevent this from happening (since it is often due to being bored) is to give them plenty of cardboard and safe nesting materials. Other causes are:
The gerbil is rubbing it's tail on something in the cage- Removing the object.
Former injury- Hair sometimes won't grow back, Nothing to be worried about.
Malnutrition- Due to poor quality or not enough food. Make sure the food doesn't have too many "treats" in it.
Mites/Lice/Fleas- Which you can get checked out by your Vet
ANSWER #2
If you have two gerbils or more the other one may be chewing off the hair, i have dagu's--which are like gerbils-- and one of them is missing some hair on her tail, due to the other one. If you only have one, i might be chewing off the hair itself. It shouldn't be a big problem though, unless the gerbil is acting different about the missing hair on its tail.
someone or something may have pulled it off. i had one and someone pulled it off. it will look boney at first. but don't worry in a few hours it will grow back but not all the way.
It allows them to slip away from predators. If a predator should have the end of their tail, it will just fall off and the gerbil can safely get away. Sometimes this happens on the gerbil wheel if it gets caught between the wires. And sometimes it happens if you pick your gerbil up by the end of it's tail.
My babies are beginning to grow visible fur and they are 8 days old.
no gerbils don't have feathers, they have fur
THey are mammals and they do shed their fur, but you won't notice it.
Yes they do after all they are mamals but then again dolphins are mamals.
That is actually a sent gland. Don;t worry your gerbils fine. :)
You shouldn't do that because fungus could start to grow on its fur.
no, not until they have fur and can open their eyes. otherwise the mom might smell your sent and not won't take care of her babies anymore.
No My gerbil Neve just the fur grows back in
No, gerbils are definitely social animals, but they are territorial. Gerbils get depressed if alone, and may even become aggressive. It is best to keep gerbils in same-sex pairs, this way they have one buddy, and there is no chance of declanning, which can happen with groups of gerbils mroe than two.
Their tails give them a larger surface area, so they can cool off faster. They have fur on the bottom of their back feet to protect them from the heat of the sand. The gerbils have a thin layer of fur on their body to protect them from sunburn.
2 Differences Between Gerbils and MiceGerbils hop, mice run. Gerbils have fur on their tails (and usually a tail tuft), mice don't.A gerbil is larger than a mouse, and has fur on its tail. Mice, on the other hand have hairless tails and aren't as nice to hold as a gerbils, they tend to squirm more and could run away easier.
no ,because it can go into their nostrils and eyes.besides it will make the fur itchy,rough and uncomfortable.