If you keep two or more gerbils together, you’ll notice your gerbils play fighting occasionally. This is normal behavior, and completely harmless. Real gerbil fighting is rare, but it can be dangerous if you don’t intervene.
Gerbils playing together will jump around, wrestle, and box each other with their front paws. Gerbils fighting will aggressively bite one another around the head and tail areas, usually drawing blood. Fighting gerbils should be separated before one of them gets hurt.
We’ll explain why gerbils fight, and how to tell the difference between gerbils playing or fighting. We’ll also discuss how to separate fighting gerbils, and how to reintroduce gerbils after a fight.
Why Do Gerbils Fight With Each Other?
Gerbils are social creatures, and can’t be housed alone. To thrive and be happy, they must be kept groups of at least two. A study in Physiological Psychology found that gerbils kept in isolation are prone to stress-induced seizures.
Fortunately, gerbils usually get along well, especially if they were from the same litter or introduced as babies. They form strong bonds, sleep together, and play together on a daily basis.
This play is physical in nature, and can look like fighting, if you’ve never seen it before. But gerbil play fighting is healthy and normal, and never results in injury.
Sometimes, though, gerbils fight for real. True gerbil fighting is rare in bonded pairs, but it can happen at any point, often without warning. It’s more common in female gerbils than males.
Real fights can result in injury and death. The reason for most gerbils fighting is because they have gone through a process called declanning.
What Is Gerbil Declanning?
In the wild, gerbils live in structured social groups of 2 to 17 individuals, according to Animal Behavior. These groups are called clans. Each gerbil within the clan has a different social ranking.
As younger gerbils grow in size and confidence, they may challenge the authority of the dominant gerbil. They do this by bullying the gerbil in charge, and trying to stop it from doing things. When this happens, the challenged gerbil will either:
- Assert its dominance, and maintain its position as the top gerbil. In this case, the clan continues as it was.
- Or concede defeat, and leave the clan to find a new home. This is called declanning.
Declanning can happen to pet gerbils regardless of how long they have been living together. The more gerbils there are in the clan, the more likely it is to happen.
Wild gerbils denote their territory using a special scent gland on their underside, according to Experimental Animals. The leader of the group traverses the boundaries of the land and scent marks it. If any gerbil that is not part of the clan tries to trespass, it will chase them away.
Unfortunately, once pet gerbils declan, the loser cannot leave to find its own territory. It is forced to stay in the same gerbilarium as the winner. This creates tension, which can lead to gerbils fighting.
Are My Gerbils Playing or Fighting?
Real gerbil fighting indicates your gerbils have declanned. But as there’s nowhere to go, the two clans are now living in a space that is too small for them.
Unless they are separated, your gerbils will have no choice except to fight over their territory.
Fighting is a gerbil’s way of saying “get out of here – you aren’t welcome.” Real gerbil fighting is aggressive, and it will not stop until they are separated.
Gerbil play fighting, however, is an entirely different thing. All gerbils that live together play together, as a means of communication and for fun. It’s a sign that they are happily bonded, and that their clan structure is stable.
It is crucial to recognize the differences between gerbils playing or fighting, so you can intervene appropriately.
Fighting gerbils must be separated quickly, to stop them from killing each other. But if they are playing, separating them would be a big mistake.
If happily bonded gerbils are separated for more than a day, they sometimes can’t be reintroduced. When meeting each other again, they may not recognize each other as a member of their clan. This can lead to fighting when there wasn’t any in the first place.
Signs Gerbils are Play Fighting
Play fighting in gerbils is a completely harmless behavior. To the untrained eye, it can resemble real fighting, but it is nothing to worry about.
Gerbils that play together are happy gerbils. When they are not play fighting, they will exhibit friendly behaviors such as sleeping together and grooming each other.
If they are play fighting, your gerbils will finish ‘fighting’ and then behave as though nothing has happened. They will seem content and at ease, and spend time together as normal. To recognize when your gerbils are play fighting, look for the following signs:
- Gerbils chasing each other. Playful chasing is quite slow and non-aggressive. They will each take turns being the chaser.
- Jumping. The gerbils will hop around together side-by-side or one following the other.
- Boxing. This is when gerbils stand on their hind legs and playfully bat each other with their front paws. They do not hurt or bite one another during this.
- Wrestling. Play-fighting gerbils will gently roll around with each other in a way that looks like wrestling. If you look closely, you may see them grooming each other as well.
Play fighting is often interspersed with cuddling, grooming, and toilet breaks or water breaks. It is usually quiet, and doesn’t result in injuries or blood being drawn.
If you aren’t sure whether your gerbils are playing or fighting, try offering them food. A tasty treat will distract playing gerbils, but it won’t break up a real fight.
Signs Gerbils Are Fighting
Declanned gerbils that are forced to live together are in a permanent state of stress. This is easily seen in their body language and behavior.
They will seem on-edge and nervous most of the time. This will be especially true for the gerbil that has been overthrown and kicked out. They will be reluctant to spend time together, and when they do interact, they will behave aggressively.
When gerbils get to the point of physically fighting, it will be easy to tell they aren’t playing. Here are the signs of a real gerbil fight:
- Puffed-up fur and arched back. This is a clear warning sign that a fight is imminent.
- Chasing. This is different from playful chasing. The aggressor will chase the subordinate gerbil, never the other way around. It will be fast/aggressive, accompanied by strikes to the rear end.
- Biting. Gerbils that are genuinely fighting will bite each other’s faces, rear ends, and tails. It’s more vicious than nibbling or grooming.
- Fighting in a ball, aka “ball of death.” This where gerbils dive at each other and grab on with their paws and teeth. It is much faster and more frantic than the harmless rolling around seen in play fighting.
- Teeth are chattering and squealing. Adult gerbils are quiet most of the time. Fighting is often accompanied by loud vocalizations.
- If your gerbils are fighting and drawing blood, they are not playing.
After a real fight, your gerbils won’t go back to normal as if nothing happened. They will remain stressed out, and will eventually fight again.
What Do I Do If My Gerbils Are Fighting?
If you notice your gerbils fighting, act fast. Once their arguing has reached the point of fighting, it can get nasty quickly.
Gerbils fighting to the death is, sadly, not uncommon. It’s because they are confined to the same cage, and can’t get away from each other.
Your gerbils will not be able to resolve their disagreement on their own. They don’t understand the concept of ‘forgive and forget.’ Once your gerbils have declanned, they won’t stop fighting until one of them leaves, or dies.
As soon as you notice that your gerbils have been fighting, remove one of them from the gerbilarium. You must do this straight away. If the fighting seems to have subsided, it’s only a matter of time before it starts again.
If you have more than two gerbils, try to identify which gerbil was the winner of the fight. The loser will have copious injuries around its tail end, from being attacked as it ran away.
Remove the loser from the gerbilarium. Leave the other gerbil(s), who weren’t involved in the fight, with the winner.
How to Separate Fighting Gerbils
Before separating your gerbils, get a box ready to place one of the gerbils into. All it needs is a water bottle, a little food, and a thin layer of bedding. This is going to be a temporary home, while you sort out a permanent housing solution.
Fighting gerbils can be vicious. They will instinctively attack anything that comes near them.
So, before placing your hands into the gerbilarium, put on a pair of protective gloves. That way, if either of your gerbils tries to bite you, they won’t hurt you. Gardening gloves work well for this purpose.
Open the gerbilarium and place your hand in between the fighting gerbils. Gently push them away from each other.
Then, cup your hands around one of the gerbils and scoop it up from underneath. Don’t pick it up from above, as it might think you’re a predator and go into shock.
Set the gerbil down in the temporary home. You can then decide whether to keep your gerbils apart, or try to reintroduce them.
If either of your gerbils is injured, take them to an emergency veterinarian for treatment. If a wound becomes infected, the gerbil could become seriously ill.
How to Reintroduce Gerbils after a Fight
Once two gerbils have fought to the point of drawing blood, they usually won’t be able to live together again. This is because the gerbils have gone through a process called “declanning.”
Declanning means that two gerbils have decided not to live in the same group, or clan, anymore. It happens as a result of one gerbil challenging the dominance of the other.
In the wild, declanning would not usually result in a physical fight. This is because, once challenged, the less dominant gerbil would leave the clan. It would find a new home to live in, and never see the other gerbil again.
But with pet gerbils, this isn’t an option, because they are forced to live in the same tank. Unless you separate your gerbils straight away, declanned gerbils will inevitably fight.
Once declanning has happened, keeping the gerbils apart is usually the best option. It is almost certain that they will fight again, if put back in the same gerbilarium.
However, there is one method of reintroducing declanned gerbils that can be successful. It’s called the split-cage method.
Split Cage Method
The split-cage method does not work if there are three or more gerbils.
But if you only have two gerbils, it can help teach them how to get along again. It’s worth trying if you don’t have the space or resources to keep a second gerbilarium.
- Remove both gerbils from the gerbilarium and place them into separate enclosures. A cheap, second-hand fish tank makes a good temporary gerbil cage.
- Keep the gerbils separated for at least a week. This allows them to recover from the fight and their injuries. During this time, empty and thoroughly clean the original gerbilarium.
- Place a divider in the middle of the gerbilarium. It should be made of wire mesh so that the gerbils can see each other, but can’t touch. On each side, place some bedding, a water bottle, and food dish.
- Put your gerbils back into the gerbilarium, one on each side.
- At least once per day, swap the gerbils to the opposite side. This will allow them to get used to each other’s scent.
- Watch for positive signs. Encouraging signs include sleeping next to the divider, trying to groom each other through the mesh, and general calmness.
- Remove the divider when your gerbils have been exhibiting positive signs for at least one week. Immediately mix both sides’ bedding together, to combine your gerbils’ scents.
After removing the divider, keep a close watch on your gerbils for the first 24 to 48 hours. If they start to fight again, separate them straight away. Start again from step 3.
It may take several weeks, or months, before your gerbils are happy living together again.
How to Stop Gerbils Fighting
When gerbils decide to declan, there is no way to stop them from fighting without separating them. Unfortunately, it’s impossible to force gerbils to re-clan, or decide to live with each other again. They would never naturally do this in the wild.
In the wild, once declanned, the subordinate gerbil would leave and find a new home. Because this isn’t possible in captivity, it makes the aggressor angry. They will inevitably fight if they can’t get away from each other.
The only thing you can do is look for the signs of gerbil declanning. Then, separate the gerbils before they get a chance to fight.
- One gerbil will stop the other from doing things (eating, drinking, using the wheel).
- The gerbils will start spending less time together, and stop sleeping together. The subordinate gerbil will avoid the aggressor as much as possible.
- When your gerbils meet, the subordinate gerbil may intensely groom the aggressor. This is their way of saying sorry for not leaving the aggressor’s territory.
- Eventually, the aggressor will get fed up, and will begin chasing the other gerbil. You may notice ‘bangs’ coming from the tank as the chased gerbil runs into the walls.
If you separate your gerbils at this point, they may recover, with the use of the split-cage method. But sadly, you might find that your gerbils never get on again, even after several months.
If this is the case, the best thing would be to keep them in separate tanks permanently. Otherwise, their fighting may lead to serious injury or death.