Changing sex?

[Menchi]

My girl at some point while I was away had the operation and now is showing glands under the arms (very faint) and her tail end is much shorter then it was. She/He is singing to the others and humped my oldest girl all night last night.

[crazy]

My girl at some point while I was away had the operation and now is showing glands under the arms (very faint) and her tail end is much shorter then it was. She/He is singing to the others and humped my oldest girl all night last night.

I think it is possible for some frogs and toads to change their sex. I know that true toads have something called a bidder's organ which usually stays inactive but can enlarge in male toads and produce eggs.