But, would you reccomend 2 males or 2 females?
I heard that the males are more affectionate then the females? Is this true? Also, I read that the males smell more then the females?
These are generalizations, buut:
Females:
-tend to be smaller
-tend to have softer, more plush coats
-tend to drip urine more often than males, and seem to have a harder time holding their bladder in general
-tend to explore more and be more active
-prone to mammary tumors
Males:
-should not be fed orange juice or peels as the d-limonene is a carcinogen in male rats (tends to cause testicular cancer)
-tend to have more wiry coats
-tend to be bigger
-are, er, well endowed which creeps some people out; more noticeable in white rats.
-tend to be chill, more sleepy and stay still for cuddling longer
-tend to be bitey around cage bars (Whether this is due to territorial issues around the home, or because they tend to be more grabby around things they think are food, I'm not sure. I can stick my fingers through the bars and my females will just lick them. Not so with many males)
-have more of a musk to them, though a clean cage means most people don't notice it. Usually have more waxy build up which often makes the fur appear orangish
-some will scent mark or spray...including on you. None of mine have noticeably done this one me
I have had and love both the females and males. I've had two favorite rats of all time, and one was a male, the other a female. They were both pretty stereotypical male and female in behavior.
I feel if you keep a male singly or in pairs or a group is your choice. Here is why. I have not yet seen females attack and kill each other (one person thought their's had, but the female had already died and the other was just snacking after the fact). I have seen many males kill each other, both lab rats and pets, including males who have lived together their entire lives. One I remember vividly was an upset friend who had her males kill each other two years in. There were no females around to explain that behavior, no changes in their setting. If you keep males in a pair, the best bet is littermates or rats of the same age purchased together, and purchased at a young age. Males can live very happily together, and be very sweet and groom each other. You may feel the benefits outweigh the risks or vice versa.
Almost every singly housed female I've seen has either been neurotic or stressed to the point of self-barbering. I always keep my females at least with a cagemate, no matter how much attention I give them. I've never seen a female of any age not take to another female when properly introduced. Some people also spay their females (prevents their dreaded mammary tumors), and keep them with a male.
As for affection, I haven't found males to be more affectionate. I've found them to be more *cuddly* in general, but I've had females follow me around the house and leap into my husband's lap because they just love being near you. They just don't sit still as long, unless you are my husband who is some kind of rat whisperer. They go to sleep on him and seem to have little ratty crushes on him. XD