This is a protective measure against predators in the wild, and it will not grow back. Toys Gerbils love to play. Chewing and digging are their all-time favorite activities. So any toys you purchase that gerbils can chew or dig are sure to be a success. They enjoy chewing on sticks, logs, pinecones and pinecone seeds, but make sure they are free of chemicals or insects.
Gerbils also enjoy chew sticks, paper towel tubes or tissue boxes.
They will make short work of any paper product that you put in. If you purchase a wheel, make sure to get the metal kind. The wheel will become unmoveable if you place it on the floor of the cage because the gerbils will bury part of it or tip it over. If you hang the wheel from the screen lid, it will always run freely. There is a slight danger that your gerbils may get caught in the wheel, but this is uncommon.