Fat male or pregnant female? So confused

So I was considering trying pre-killed mice for my bp until I figure out if I want to order online, or even breeding on a VERY small scale myself, so I went and picked up two mice today. But the ones I got look like very fat males or pregnant females, the only problem is the both look like male genitals!! They both weigh 22 grams, which is a little bit more than 15% or my BPs weight, but not over 20%. But I think this is because they are overweight/pregnant, so hopefully I can slim them down a tiny bit to the perfect size.

Sorry for the pics. S/he wouldn't stop moving! haha

http://i1076.photobucket.com/albums/.../iPhone005.jpg
http://i1076.photobucket.com/albums/.../iPhone008.jpg
http://i1076.photobucket.com/albums/.../iPhone007.jpg

There are no nipples that I can see even after looking through the fur, I'm very sure these guys are overweight males, but I would just like some second opinions. :)

EDIT: The reason I second guess is because according to this picture:

http://www.thefunmouse.com/info/imag...ng/AdultLG.jpg

There really IS a bit of space between the anus and the vaginal orifice. But a lot of places say it's almost connected. I personally think the mice I have look similar to the female genital picture show in the link, but I'm caught off guard by the bulges! They are not shown in the picture because s/he's not relaxed, but I will get up a picture of them running around or something when they're out. I will also try to get a better picture of the genitals.

More pictures, because I couldn't edit the first post.

http://i1076.photobucket.com/albums/...gue1/004-2.jpg
http://i1076.photobucket.com/albums/...gue1/002-2.jpg
http://i1076.photobucket.com/albums/...logue1/001.jpg

Those are boys


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See that little flap inbetween? Those are the testes. If you let him grab on to something it will actually push those out.


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And females will have the nipples. Especially pregnant ones.

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Yep, just a fat boy.

Thanks everyone. :D

Male..lol. BUT he isn't fat..

THIS is fat. :P (excuse my face.) Fiancee snapped the picture while I wasn't looking!

http://i1235.photobucket.com/albums/...-14_224924.jpg

My pregnant females aren't even as big of him.. He's a pet and lazy as well... Surprisingly he's a little horn dog! :P

Male, here is something to help you sex your rats http://www.afrma.org/sexing101.htm

Quote:

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Originally Posted by zeion97

Male..lol. BUT he isn't fat..

THIS is fat. :P (excuse my face.) Fiancee snapped the picture while I wasn't looking!

http://i1235.photobucket.com/albums/...-14_224924.jpg

My pregnant females aren't even as big of him.. He's a pet and lazy as well... Surprisingly he's a little horn dog! :P

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That looks like a 'lethal yellow' mouse. Mice of that color and phenotype tend to get fat. They're used as obesity models in research.

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Satomi, that is not a lethal yellow (also known as dominant red). They do not exist in this country out side of about 3 breeders, who keep them very tightly in check.


The mouse is a recessive yellow, or an undermarked brindle, and is also satin. Recessive yellow is also prone to obesity. :gj:


and if we're having a fat contest. . . How about these 2? ;)
The gray (beige brindle) one now weighs 100 grams. The orange (argente) one passed away.
http://www.iaza.com/work/120127C/iaza13746231277200.png

Quote:

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Originally Posted by Rhasputin

Satomi, that is not a lethal yellow (also known as dominant red). They do not exist in this country out side of about 3 breeders, who keep them very tightly in check.


The mouse is a recessive yellow, or an undermarked brindle, and is also satin. Recessive yellow is also prone to obesity. :gj:

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Really? I was taught they were the same thing in my lab animal course. Thay recessive yellow was also called lethal yellow. Thanks for the correction. I'll keep that in mind.

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Quote:

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Originally Posted by Rhasputin

Satomi, that is not a lethal yellow (also known as dominant red). They do not exist in this country out side of about 3 breeders, who keep them very tightly in check.


The mouse is a recessive yellow, or an undermarked brindle, and is also satin. Recessive yellow is also prone to obesity. :gj:


and if we're having a fat contest. . . How about these 2? ;)
The gray (beige brindle) one now weighs 100 grams. The orange (argente) one passed away.
http://www.iaza.com/work/120127C/iaza13746231277200.png

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WOAH! Those are some fat mice..lol.. I got him from a local store/breeder. He's a good little guy just lazy. ;) I did however have 2 previous ones from him, 1 hit almost 90 grams, the other hit 125. Sadly both died..

Do you have a link to a thread or site I can learn more info on types of rats and mice?

Satomi - Yep. Ay/- is lethal yellow/dominant red and e/e is recessive yellow/recessive red. Ay/Ay mice (homozygous lethal yellow) die. But both are prone to obesity, as are a lot of the red breeds. Strange though that it seems to have nothing to do with the amount of red, or pheomelanin. :confused:


Zeion - To learn about mouse genetics you can use this site here: http://www.hiiret.fi/eng/breeding/varieties/breeds.html

(Clicking the I II III IV V etc will change the section of mice you are looking at)


You can also join my forum here: www.themouseconnection.org
Its a new forum, but you'll find that any questions you have about mice, will be answered drama free, lol. :)