@vicky_molokh-unsilenceMonica Weird part: the original changelings didn't have any hole and those are somehow hinted to be scars they got after Celestia/Luna were annoyed enough to go into Holy Smite mode.
option a) every changeling is from that old battle that happened at least a thousand year before. They never healed and despite being able to change form they still use one that bears the sign of that battle
option b) Chrysalis is the one stupid enough to want to keep that appearance and the others have just to adapt.
So, why she still look like Emmenthal cheese... no one knows