SO I know that I have 6 females and 2 males. I quadruple checked when they were younger. They are now 3 weeks old and have so much hair it is impossible to use the nipple method. All of the babies look the same and have the same coloring. Nothing different to tell them apart. It is very very important for me to be able to find these 2 males and put them with the father. I do not want to accidently put one of the female babies with the father when I plan on seperating him. If that were to happen I would have another litter on my hands in a couple of months.
Welcoming Ignatz and Jeraboa's first litter of pups June 30th 2011 !
You may have to wait until the males develop enough for you to tell the same way you sex the adults. If you recall with me at 4 and 5 weeks I could tell the gender of most of my gerbils with the adult method, however I had a smaller one who I had to wait a little longer to see. It was about 5 1/2 weeks for that one to be completely developed down there for me to know for sure.
You have enough time to wait for them to develop don't worry, at 3 and 4 weeks they still need their mum, at 5 weeks they are mostly weened and learning Gerbil stuff, I think it was after the 5 week mark that I actually saw my pups use their water bottle regularly instead of relying on mom.
If you are worried about pups because you have mixed genders right now, don't, even at 6 weeks they aren't mature enough to reproduce and you should definitely be able to tell their sex by then.
At that age some are easier to sex than others. In males, the distance between the genital papilla (the bump) and the anus (the dent) is greater than in females. In cases where they're either very far apart or very close together, you'll know which they are. The problem arises with the pups that have intermediate distances. If you have any of those, best wait until a bit older. But keep checking. The testes in males can descend at different times.
Thanks for posting that link racammann - I'm having the same problem. I have a litter of 7, who are 3 weeks old, which I had sexed, but now they are all furry It's harder to tell who's who and I need to split Dad and the boys before Mum has another litter :/
Last Edit: Sept 12, 2011 1:50:08 GMT -8 by heathergw