What does it mean if a gerbil goes out of group to sleep on own?

It's perfectly normal for gerbils to sleep apart from their group sometimes. While gerbils are social creatures and generally enjoy company, they also need their own space and privacy.

Here are some reasons why your gerbil might be sleeping alone:

* Individual preference: Some gerbils are simply more independent than others and prefer to sleep alone.

* Feeling unwell: If a gerbil is feeling unwell, it might withdraw from the group and sleep alone to avoid bothering others or spreading illness.

* Territoriality: Gerbils can be territorial, especially if they are in a crowded cage. If a gerbil feels crowded or stressed, it might sleep alone to find a more comfortable spot.

* Social hierarchy: In a group of gerbils, there is usually a dominant individual. The dominant gerbil might have the best sleeping spot and the other gerbils might sleep alone to avoid conflict.

What to do:

* Observe your gerbil's behaviour: If your gerbil is otherwise healthy and active, there's no need to worry.

* Ensure they have enough space: Make sure your gerbil cage is large enough for all the gerbils to have their own space.

* Monitor for signs of illness: If you notice any other signs of illness, such as loss of appetite, lethargy, or diarrhea, then it's best to consult a veterinarian.

Important: If you're concerned about your gerbil's health or behaviour, it's always best to consult a veterinarian. They can assess the situation and provide personalized advice.