Gender fairy....sounds like a boy. Males can retract the "boys" which will make the testicles appear to grow and then shrink...and they can retract to the point that they appear to be female. My concern here is you say that only one is down. Since you have had this rabbit since January....both testicles should have dropped. If there is only one there, a visit to a rabbit savvy vet is in order. In a small number of males, one or both of the testicles might not drop into the scrotum....a condition known as a "cryptorchid testicle". I often joke with vets thatthey should do a neuter and a spay for this condition. And we have had a hemaphrodite....genetically femalebut with smallmalformed male parts.But most likely you have been visited by the "gender fairy" and you have a male rabbit.
If you could post your general location in your profile, some of us might be able to help you find a rabbit vet.
Randy
