I agree with the others. Looks to be female and a bit under sized as well. If you are still in contact with the breeder I would reach out and let them know. I hate to say it but a lot of breeders will tell you it is a male without any guarantee because they know its a female and just want a male pricing on it. As for size, I would say she is about a month behind and hopefully she will catch up in size as at this age she should be growing by leaps and bounds.