fd2f0995_rbil_Care___Is_My_Gerbil_Sick___My_Gerbil___
[It might be...] normal. Gerbils do this all the time. Give him or her a tube if the noise bothers you. [My Gerbil...] 
is digging madly in the corner
Shawsheen River Gerbils - MA & CT - Gerbil Care - Is My Gerbil Sick?
My Gerbil...