Gerbils need exercise, as does any lifeform, to maintain a healthy life. The best way to do this is to provide a wheel in their cage. Many gerbils love a wheel! A fun way to add exercise may be to purchase a small rodent ball, and allow your gerbil some free roaming time in a safe area (i.e. away from other pets, stairs, electricity, etc.).
Exercise wheels.
well...lets picture a furry ball.
feed them a little less and buy them an exercise wheel
Blood
The gerbil lives in a desert environment. They get most of their water from their food but still need water to drink. They can stand heat. They won't pee a lot because they can't waste water in the desert. Gerbils need exercise because they move fast. Also they need to chew. Like all rodents gerbils teeth grow quickly and they need to wear them down. Gerbils tails, kind of like lizards, will break at the tip. If you grab the very end of a gerbils tail, it will break off with a lot of blood so as to distract their predator. Unfortunately, it will not grow back. This will not harm the gerbil, only help them if they're in danger.
Feed them less and make sure they have a wheel to exercise on. More exercise, less food, just like us humans. :0)
They like chewing toys, exercise balls, play pins, and wheels inside there cage. Hope this helps
Guinea pigs run laps for exercise. That's why they need plenty of room in their cage or lots of floor time. Never put a pig in an exercise wheel or ball, they can cause unnecessary strain on the spine.
Gerbils don't need shots.
Baby gerbils need their mother's milk and should not be given anything but kitten replacement milk and only if something happens to the mother.
You need exercise, period!
If their in the wild, they hunt it. If they are owned by someone you give them food. In the wild gerbils dig up roots or forage for seeds. But if they are domestic/pets then you will need to give them food.