Hamster Cage Sizes: From Speculation To Calculation
So what is the deal with all the different minimums for hamster cage sizes floating around different forums and social media? I gathered this information from my own, and my friend’s observations found during research and through happenstance.
Hamster Cage Sizes: The Origin
The 450 square inch recommendation originated from a US hamster care forum about 20 years ago. This information somehow spread like wildfire. Many people considered it the recommended size in the US for years. If you search on minimum hamster cage sizes, you will find this number multiple times in your research. You can find abysmally low recommendations of 200 square inches on nonprofit and animal shelter websites today. However, as education spread about hamster stress symptoms, people started realizing this was not a good size for hamsters.
Guesses, Guesses
The issue? They didn’t know what a good size was, it just had to be more. Many people today still say 450 square inches is the absolute bare acceptable minimum to provide a hamster. Then they say it is only good as a temporary enclosure, or the new owner should upgrade. Which gives some people who will take the lowest number, the idea 450 sq. in is acceptable. After all, the advisor had the word in the description, even if “absolute bare” is in front of it. The vast majority of hamsters will show signs of stress in a cage this small, and it is not a proper size to offer even as a bare minimum recommendation. The well meaning advisor often will then put another, higher number in front of it. This is where the nudging starts.
Rising Numbers
So it went to 500 square inches. From there it rose to 600, and again to 750. Some groups started saying if you are not providing your hamster at least 2,000 square inches, you are neglecting it. This is not true. Many people simply do not have space to provide 2,000 square inches, or 13.88889 square feet to their hamster. For comparison, the standard closet is around 12 square feet. 2,000 square inches is 1.2 meters, enough room to house 2 female guinea pigs.
A hamster would be in a living heaven with a properly cluttered cage that large, but setting it as the minimum would prevent many people who could care for a hamster from getting one. Keeping more hamsters in shelters and foster programs, who would otherwise get a wonderful home. Hamsters really have no maximum floor space; the more the merrier. This contributes to the escalating recommended minimums.
So, what are the facts for hamster cage sizes?
While these people are well meaning, let’s put the brakes on and re-evaluate from a scientific standpoint. Behaviour of golden hamsters (Mesocricetus auratus) kept in four different cage sizes. Here is a more accessible PDF document of the same study. This study video recorded the behaviors of hamsters kept in 4 different sizes of cage. They also measured cortisol and other hormone levels. This study established a scientifically backed standard in many hamster care communities.
The acceptable standard minimum is 775 square inches. While some hamsters may still need more space to be happy, (I’m looking at you, female Syrian hamsters!) most hamsters will be content in 775 sq. in. when properly cluttered with enrichment and provided enough bedding. (PDF: The influence of bedding depth on behaviour in golden hamsters (Mesocricetus auratus)) Every hamster is different, so understanding the stress signs will help determine if more enrichment or an upgrade is necessary
Signs Of Stress
The following are some signs of stress which may show an upgrade or additional enrichment are necessary.
- Biting the bars (bar biting)
- Climbing along the top of the cage (monkey barring)
- Charging and attacking new objects in the cage (territorial/cage aggression)
- Constant, obsessive attempts to escape
- Pacing back and forth for extended periods of time
When To Upgrade Hamster Cage Sizes
Add Enrichment
If your cage is already at or above 775 square inches and there is room for more enrichment, add more first. A lack of enrichment may be the problem, which is a cheaper fix than a cage upgrade. Adding more enrichment can, but does not have to include increasing bedding depth. Burying enrichment is also an option, which adds to possible enrichment space, but can be ineffective if your hamster does not find it.
Upgrade Hamster Cage Sizes
If after a week or two your hamster’s symptoms do not improve, upgrade the cage by another 100 square inches or more. If symptoms still show, add more enrichment to fill the expanded space. Upgrade again if necessary. Bigger jumps in cage sizes may save more money in the long run by requiring fewer upgrades to find the size your hamster is content in.
Tend To The Individual
Some hamsters can be in a 1,500 or 2,000 square inch decked out, enriched cage and showing no improvements to stress. If you are able to upgrade more, do so. However, sizes larger than this become increasingly difficult to accommodate. If you are unable to, it is now acceptable to stop upgrading and try managing symptoms other ways. A lack of contentment at 1,500 and 2,000 square inches is confusing to many, and we can only guess the reasons. Some complete guesses with no scientific backing are: the hamster gained a habit from living in too small a cage early in life or has genetic / neurological issues. Second hand anecdotal evidence: some owners had hamsters who would not initially use all the space in their new, larger cage after they adopted them from an owner who kept him/her in a tiny cage. These hamsters needed time to adjust to more room, but eventually began using the additional space.
Wrapping Up Hamster Cage Sizes
In our journey, we went from 450 inch speculations to 775 square inch science-backed facts. Knowing the signs of a stressed hamster will alert you of their need for more enrichment or space. An enclosure with many fun things to do helps keep your fur baby happy. Now you know what is going on when someone tells you your hamster cage should be 5,000 square inches!
The images above are a beautiful example of a proper hamster cage set up. Full of various types of enrichment, plenty of deep bedding for burrows, different textures to explore, and a safe sized wheel! There is a ton to do in this cage and it has so much you can get inspiration from! 2 large Bucatstate 3.0 47 x 23.6in cages combined make 2,218 square inches of floor space. This is plenty of space for most hamsters, and at a reasonable price point of $519.98 on amazon as of November 2024.
And a special thank you to Hammily Ever After on Instagram for giving me permission to use her amazing cage photos!
References
Hamster Society Singapore: hamster cages
(Title translated from German) Veterinary Association for Animal Welfare Dwarf Hamsters
(Title translated from German) Veterinary Association for Animal Welfare Golden Hamsters
APA References
Fischer, K., Gebhardt-Henrich, S.G., & Steiger, A. (2007). Behaviour of golden hamsters (Mesocricetus auratus) kept in four different cage sizes. Animal Welfare. https://www.semanticscholar.org/paper/Behaviour-of-golden-hamsters-(Mesocricetus-auratus)-Fischer-Gebhardt-Henrich/3891ee836d1c5fd8479e67ae51c6069167f0f78e PDF: https://www.hamsterwelfare.com/wp-content/uploads/2021/03/behaviour-of-hamsters-four-different-cage-sizes-study.pdf
Gebhardt-Henrich, S.G., Vonlanthen, E., & Steiger, A. (2005). How does the running wheel affect the behaviour and reproduction of golden hamsters kept as pets. Applied Animal Behaviour Science, 95, 199-203. https://doi.org/10.1016/J.APPLANIM.2005.02.019
Hauzenberger, A. R., Gebhardt-Henrich, S. G., & Steiger, A. (2005). The influence of bedding depth on behavior in golden hamsters (Mesocricetus auratus). Applied Animal Behaviour Science, Volume(Issue), DOI: https://doi.org/10.1016/j.applanim.2005.11.012 PDF: https://moscow.sci-hub.se/1310/8949560145f68e2d6e5dbdb8d5ec69bc/hauzenberger2006.pdf?fbclid=IwAR2QewbQLE1ekPwDhJG8aFPuusbsKWzb5uYFsHJrhErSLLW7qDHViNAZUEY
Kuhnen, G. (1999). The effect of cage size and enrichment on core temperature and febrile response of the golden hamster. Laboratory Animals, 33, 221 – 227. http://journals.sagepub.com/doi/pdf/10.1258/002367799780578246
Spiehs, M. J., Brown-Brandl, T. M., Parker, D. B., Miller, D. N., Berry, E. D., & Wells, J. E. (2013). Effect of bedding materials on concentration of odorous compounds and in beef cattle bedded manure packs. Journal of environmental quality, 42(1), 65–75. https://doi.org/10.2134/jeq2012.0251
