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Another Question

khalliaar Nov 27, 2003 04:42 PM

I was wondering if 2 male mice will ever mate with each other if they are left alone in a tank. I have two mice in a tank together, a white and a brown one. They are fairly young and the pet store told me that the white one was female and the brown a male. Yesterday I was watching the restless white one run and run in the wheel when the brown one came out and the white one mounted it. Could they both be males or is it most likely that the pet store sexed them totally wrong? I know I just didn't get them backwards because I got them at separate times. Also the white one looks a few weeks older than the brown. thanks for any of the input.
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1.0 ball python (vakker)
0.1 dogs
2.1 cockatiels
1.1 chinchillas
Coming soon... 1.1 corn snakes
0.1 axanthic ball python

Replies (2)

Lucien Nov 27, 2003 06:45 PM

Sexual display is also used as a dominance behavior... In many animals...Among males and females.. more dominant animals will mount less dominant ones as a show of who's boss... My female dog does it to our male all the time. I also have 2 female rats who the most dominant of frequently mounts the less dominant...
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Lucien

1.0 Columbian Redtail Boa (BCI)
2.1 Leopard geckos (2 Blizzard and 1 het Blizzard)
0.1 Savannah Monitor
13 rats
12 Gerbils
2 Dogs
3 cats
1 Albino Corey (fish)

LdyPayne Nov 28, 2003 03:41 PM

You should be able to tell quite clearly which these mice are male. By the time they are 4 weeks old, their testicles start to come down, fully out by 5 weeks. Keep in mind that if they are nervous they can pull them back into their bodies which can make them to be mistaken for females unless one knows other ways to sex mice.

Other than the obvious presence of testicles, males have a greater distance between their anus and urethra than females. Females also have more prominent nipples on their stomachs than males.

If your mice are two males, most likely what you are seeing is dominance behaviour. Male mice don't always get along very well housed together, unless they have pleny of room for their own nests. Some males have little problems being together but others can fight aggressively, especially if they smell females in the area. They should deffinitely be separated if you introduce females in with them.

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