Gerbils as pets are great because they are generally very healthy with very few problems. One of the biggest appeals of these delightful creatures is their adorable appearance, and sweet, soft fur. Owners love to nuzzle their furry little companions. However, gerbils can still suffer from an occasional gerbil disease, such as hair loss (alopecia), just like a dog or a cat. Hair loss or “alopecia” can occur on one part of the body or appear in patches over the entire body.