Here's why:
* Natural chewing behavior: Gerbils are natural chewers. They need to gnaw on things to keep their teeth trimmed and wear them down. Cardboard is a tempting material, but it can be dangerous.
* Small, sharp pieces: When gerbils chew cardboard, they break it into small, sharp pieces. These pieces can easily get stuck in their throats, causing choking.
* Digestive problems: Even if the pieces don't get stuck in the throat, they can cause blockages in the digestive tract. This can lead to serious health problems, even death.
To prevent choking:
* Avoid cardboard in their cage: Do not use cardboard boxes, tubes, or other items as enrichment or bedding for your gerbils.
* Provide safe chew toys: Offer your gerbils safe and appropriate chew toys made of wood, natural fibers, or ceramic.
* Supervise them closely: Keep a close eye on your gerbils when they are playing with any new toys.
It's always best to consult with your veterinarian for specific advice on gerbil care.