Reptile & Amphibian Forums

I'm pretty sure both of my mice are female, Both have very noticable nipples and neither have any visible testicles and they are 2-3 months old. Anyways, last night I heard one of them squeeking a lot and they are very quiet mice. when I checked on them one was constantly chasing the other around and sniffing at her vagina. When I looked I was pretty sure the one being chased was in heat. Is it normal for another female to be curious like that when a female is in heat? Also, what could she have been doing to make the other squeal? Thanks a lot.
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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

Female mice will appear to "hump" on each other. It is a dominance thing. Often I've found that the one DOING the humping is the one that is in heat. The squealing is just them fighting a bit, unless you see blood it isn't a problem. I had one mouse that was with her litter and no male... when I saw her trying to "hump" her hoppers, I pulled her out and put her with a male... babies three weeks later.
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~Sasheena

Females will sniff at each other and try breeding each other. They can also become rather aggressive towards each other when one or other is in heat. Sometimes, the dominant mouse will start really nipping at the submissive mouse's rump, and it causes extreme stress. It may even be fatal, if it is persistent and injuries result.

Hamsters are the worst. When female hamsters are in heat, it isn't at all uncommon for one to kill another. Mice rarely go that far with their aggression, but you need to be aware that it does occasionally happen.
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tricia