why do he shake and how old is he

Question
I was wornderin why everytime i hold or touch him he shakes he is also constantly drinking water or nibbleing on paper.can i bath him,if so how.And how can i tell how old he is

Answer
Hi

When you hold and touch him he may shake because he is nervous or scared of you.

He may also be old.
You can bath him in Warm water Make sure it is not hot
Put him in it and apply the shampoo but not to the head dont even put his head under water
You will have to buy special shampoo from a petshop for guinea pigs

You can not tell how old he is only if you watch him does he walk slow and when did you get him?

Good Luck

Mitchell Randall