One ferret or two? What the research says about pairs
Published by Planète Pets · managing editor: Clément Lacaille · reference guide rewritten with every source checked
Two ferrets, in most homes, yes — provided you choose the pair carefully. Ferrets place real value on the company of another ferret: in a Dutch study they pushed open a door weighted with almost a kilo to reach one. But two strangers put together often fight: in an American study, 49 of 82 pairs of strangers came to blows. The safest route is to adopt two ferrets that already live together, or to pay close attention to how you match and introduce them. A single ferret is still an option if you can give it several hours of play every day.
Contents · 7 sections
Do ferrets really want a companion?
Yes, and it has been measured. A study by Reijgwart and colleagues, published in 2016 in Applied Animal Behaviour Science, housed seven female ferrets in a set-up of seven chambers linked to a corridor by doors whose weight increased every day. Each chamber held one type of enrichment (tunnels, balls, water bowls, foraging, sleeping, social contact); one chamber stayed empty for comparison. The heaviest door an animal will still push open measures how motivated it is.
Contact with another ferret reached 995 g on average, well above the empty chamber and in the same range as foraging (950 g) and tunnels (940 g); only sleeping enrichment (1,450 g) and water (1,075 g) scored higher. The authors conclude that a hammock, other ferrets, foraging opportunities and a large water bowl are among ferrets’ preferred enrichments.
| Enrichment | Heaviest door pushed (mean) | What it means in practice |
|---|---|---|
| Sleeping (hammock) | 1,450 g | The hammock was used for 9.2 h against 0.6 h for an enclosed bed |
| Large water bowl | 1,075 g | Preferred to the small bowl (5.8 min against 3.1 min) |
| Another ferret | 995 g | A companion ranks alongside a good foraging set-up |
| Foraging | 950 g | No clear preference between the two devices tested |
| Tunnels | 940 g | Varies a lot between ferrets; flexible tunnel preferred to rigid |
Two caveats: the study involved seven female laboratory ferrets, and the companion was one enrichment among several, not an absolute need. It shows that ferrets actively seek out their own kind, not that a single ferret is bound to be unhappy. That is why, if you keep one ferret, you need to make up for it with play, foraging and time out of the cage: see our ideas for ferret toys and enrichment.
Do two unfamiliar ferrets get along easily?
Not always, and this is the point most advice leaves out. A study by Staton and Crowell-Davis, published in 2003 in the Journal of the American Veterinary Medical Association, observed 56 healthy ferrets placed in pairs in an enclosed area. Among pairs of strangers, 49 of 82 fought. None of the 31 pairs of ferrets that already shared a cage fought.
| Situation | Observed result |
|---|---|
| Pairs of strangers | 49 of 82 pairs fought |
| Pairs of cage mates | No fights in 31 pairs |
| Two neutered females or two intact males | Significantly more fighting |
| Neutered female + intact male | Less fighting than the two combinations above |
| Neighbouring cages for 2 weeks before meeting | No less fighting than without that step |
| Time of year | No apparent effect |
For neutered ferrets that do not know each other, the authors suggest that pairing two males or a male and a female is likely to produce the least aggression. This goes against a common belief: two neutered females are not the easiest pair. Another useful finding: keeping two cages side by side for a fortnight does not make the first meeting any calmer.
How do you choose and introduce a second ferret?
- Safest option: adopt two ferrets that already live together (littermates, a bonded shelter pair). It is the only situation in which the study saw no fighting at all.
- If you are adding a ferret to a neutered one, favour a male or a male-female pair over two females.
- First meeting on neutral ground, supervised, in short sessions. Rough play and noise are normal; a held bite on a screaming ferret, or one animal that keeps fleeing and hiding, means you should separate them.
- Double what matters: two hammocks (sleeping is the resource ferrets want most), two bowls, two litter trays.
Our protocol for introducing a second ferret sets out the steps, and our article on neutering and play aggression explains the role of hormonal status.
When is one ferret the better choice?
An older ferret that has always lived alone, a sick or easily tired animal, or an already tight budget are all reasons to stay with one ferret. A second animal doubles the food, litter and vet bills, even if the cage and some of the equipment are already there. Run the numbers with our guide to how much a ferret costs per month. A single ferret needs you as its playmate: long daily sessions out of the cage, foraging, flexible tunnels and a hammock.
What we checked
- Both studies were found through Crossref and PubMed; each DOI resolves to the right title, authors and year.
- We re-read the abstract of Staton and Crowell-Davis (2003); every figure in the fighting table comes from it.
- We read the published version of Reijgwart et al. (2016) (Utrecht University repository); the weights and durations quoted come from it.
- We removed the unsourced price ranges from the previous version and corrected the claim that “two females get along most easily”, which the 2003 study contradicts.
- We did not observe any ferrets ourselves: this guide summarises published research.
Frequently asked questions
Can a single ferret be happy?
Yes, if it gets a lot of attention: several hours out of the cage each day, play with you and a rich environment. Ferrets seek out other ferrets, but the 2016 study shows they also place high value on sleeping places, water and foraging. If your ferret becomes listless or its behaviour changes, see an exotics vet.
Which pair of ferrets gets along best?
Two ferrets that already live together. For two unfamiliar neutered ferrets, the 2003 study favours two males or a male and a female; two neutered females fought more often.
Should the cages sit side by side before the first meeting?
It does no harm, but it is not enough: ferrets housed in neighbouring cages for two weeks fought no less when they met. What counts is supervised, gradual meetings on neutral ground.
When should you separate two ferrets that play rough?
Ferret play is loud and physical. Separate them if one screams non-stop, bleeds, keeps running away or can no longer eat or sleep in peace, then start again more slowly. Find more advice in our guide to keeping a ferret alone or paired.
Sources
- Staton, V. W., & Crowell-Davis, S. L. (2003). Factors associated with aggression between pairs of domestic ferrets. Journal of the American Veterinary Medical Association, 222(12), 1709-1712. doi:10.2460/javma.2003.222.1709
- Reijgwart, M. L., Vinke, C. M., Hendriksen, C. F. M., van der Meer, M., Schoemaker, N. J., & van Zeeland, Y. R. A. (2016). Ferrets’ (Mustela putorius furo) enrichment priorities and preferences as determined in a seven-chamber consumer demand study. Applied Animal Behaviour Science, 180, 114-121. doi:10.1016/j.applanim.2016.04.022
In our shop, for this use: Double-layer plush hammock for rats, squirrels or ferrets (€18.90) · the whole shop
This guide is part of Planète Pets’s Ferrets universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.
