1. Identify if they are actually overweight:
* Visual inspection: A healthy gerbil will have a noticeable waistline and a defined ribcage. If you can't feel their ribs easily, or their belly hangs low, they might be overweight.
* Body condition score: Look for resources online or talk to your veterinarian about using a body condition score chart for gerbils.
2. Determine the cause:
* Diet: Overfeeding is the most common cause. Are you giving them too many seeds or treats? Gerbils need a balanced diet of high-quality gerbil food, fresh vegetables, and occasional treats.
* Lack of exercise: A gerbil in a small cage with limited opportunities to run on a wheel or play might gain weight.
* Medical conditions: Sometimes, health issues like thyroid problems can cause weight gain.
3. Take action:
* Consult a veterinarian: It's essential to rule out any underlying health issues.
* Adjust their diet: Gradually reduce the amount of seeds and treats you give. Increase the proportion of fresh vegetables (safe ones for gerbils) in their diet.
* Increase exercise: Provide a larger cage with plenty of space for running and climbing. Offer a solid running wheel and other toys to encourage activity.
* Limit treats: Treats should be given sparingly, not as a staple of their diet.
* Monitor their progress: Keep a close eye on your gerbil's weight and adjust their diet and exercise routine as needed.
Important Note: Be patient! Gerbils can be prone to obesity, so getting them back to a healthy weight might take some time. Focus on gradual changes and making sure they have a balanced diet and enough exercise. A healthy gerbil will live a happier and longer life!