http://beastkeeper.com/pet/9490 I bred that foal right there, and got all his genes figured out, thing is, neither parent has the elemental vulnerability. Is this a bug or can that happen in breeding?

Thanks for reporting!

This could happen because of degenaration but in this case it's a bug. Not inbred children shouldn't have such genetic deviations. We fixed this baby and the bug itself, thanks for attentiveness.

Sorry for the inconvenience.

Thanks for fixing it! ^ ^ No inconvenience at all.