Yes, they will become lonely and depressed if they don't have another gerbil. You usually buy gerbils in pairs to stop this problem. However it is very dangerous to introduce two gerbils who have never met before. They can often end up killing each other. As when you buy them in pairs they are siblings. And have been together since a young age.
Blood
Gerbils need a water bottle with a sipper tube for proper hydration.
No you do not. I started with daily disposables when I was 11years old.
a humanm need 18 -20 glasses of water per day.
a dog needs a loyal trustworthy companion (human) as they need to be under attention every few minutes. they need to have a tight schedule.
Contact lenses can be changed at various intervals, depending on the brand, and specifics of the lens. Some brands need to be changed daily, while others can be re-used for up to two weeks.
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.
Gerbils don't need shots.
Contact your employers human resources department.
Yes protein is essential for a human diet, you must eat protein daily.
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.
I would say that is a tie. They both need to keep their teeth trimmed. If you have any more questions on gerbils visit my site, www.freewebs.com/gerbils1234