I recently got two tenrecs (sisters of the tenrecs of M.van Leuven). The general idea was that they are female, but I have my doubts. At night I hear a lot of squeeky noises. When I took a look, one was biting the other in the hindlimbs and belly... They were quite actively running after eachother.
How do I differentiate?

Second question, when can I find a pedigree to tell that I have two tenrecs? (I live in the Netherlands, in Utrecht.)