The size of our gavel is fine, if the gavel is swallowed they need to be able to pass it. I'm no expert on them but I brought 2 albinos 2 weeks ago and have done a lot of reading up on them. Mine are tiny and can't tell the sex of mine yet, but if u google African clawed breeding (if u intend to or not) it also tells you the earliest signs of how to tell the difference. If you brought yours both from same shop best not to breed they are most likely related.