Gerbils' tails should be as long as the gerbil itself. If they don't, their balance will be disturbed.
They vary, most gerbils grow to 4-6 inches (10-15 cm) long [not including the tail; up to 12 inches including the tail]. Great Gerbils, the largest gerbils, grow up to 8 inches (20 cm) long [not including tail; up to 16 inches including the tail].
Gerbils can grow to be about four inches long without the tail. Depending on the tail length, they can grow to be about 6 to 10 inches long.
balance
A gerbil is about the same length of its tail.
Most gerbils grow to 4-6 inches including the tail].large gerbils grow up to 8 inches not including tail
Put some Vaseline on the tip of its tail. Unfortunately it won't grow back :(
A gerbil's tail will grow to be as long as they are--about 4-5 inches. But never pick them up by it--a gerbil's tail will come off like a lizards, but won't grow back.
When full grown they are 7-8 inches long including the tail. By 6 months old they are full grown usually earlier.
If you mean 'Why to Gerbils shed their tails?' then I can help you! Gerbils only shed their tails if they are very frightened or in pain. The commonest way that a gerbil loses their tail is when somebody picks them up by it. They will also she their tails if the tail gets trapped. Please be careful and take precautions so the gerbils are as safe as possible, because it hurts the gerbil when they shed their tail. The tail won't grow back, and the gerbil's balance may be affected.
gerbils are all born with tails but they have the ability to lose part of their tail. It will never grow back, and it will be harder for them to balance. They like their tails.
it depends on the type of gerbil
Male gerbils can be neutered, but it is not recomended. Female gerbils should not be spayed. In general male gerbils should not be neutered unless there is a good reason for it.