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Anonymous File :-(, x)
>>266061
No trouble, man. You should really consider getting two, however, as they can develop psychological issues if kept alone. (Rats are naturally social animals.) In addition, the stress can make them more prone to disease, and they generally won't live as long. The monetary and time investment differences between caring for one rat or two is minimal.
If, for whatever reason, you cannot keep more than one - it's mostly a matter of personal choice. Females tend to be smaller and more playful, males tend to be larger and more cuddly. (This, of course, varies from individual to individual, but that's the rule of thumb.) A warning about males, however - they go through a period of heightened aggression during puberty. If that's not a big issue, it doesn't particularly matter. You might keep an eye out for dumbo-variety rats (they can be identified by their larger, wider-set ears, I've pictured one here), they tend to tame quicker.
If you do decide you can handle two, as aforementioned I'd advise two females from the same litter. Other combinations are possible, but this is the easiest and best for a beginner.
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