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How to treat head tilt in gerbils 
See if your gerbil is having difficulty walking straight. 
Gerbils with head tilt will often walk or run in a continuous circle. With the imbalance that causes a head tilt, your gerbil won't be able to walk or run in a straight line.
If you notice your gerbil moving this way, keep an eye on it until you can get it to the vet. Walking in a tilt won't hurt your gerbil, but running into walls or furniture because it's off balance will.