Rough fur on your gerbil is generally
a sign of another condition at work. Some diseases including
parasitic infections have been know to cause rough hair in
gerbils. Accompanying the rough hair may be spots or patches
of hair loss.
High humidity levels can commonly cause your gerbils fur
to become rough. 50% and higher humidity is far too high for
gerbils and is likely to cause this condition. High humidity
generally occurs in habitats which have a sealed lid on them
because this does not allow adequate air flow and the moisture
is allowed to build up. Aquariums may be easy to create a
gerbil enclosure out of and easy to clean but the promote
a humidity level that is too high. If you do use an aquarium
to house your gerbils in, ensure that there is plenty of air
circulation to dissipate the humid air.
If you have already checked the humidity levels and they
appear to be appropriate for your gerbil it is recommended
that you take it to see your veterinarian. As mentioned above
rough hair or hair loss is usually an early warning sign that
your gerbil has another disease or infection.