Oscar - ridge at back of skull

[krazyaboutkatz]

My Sunny is an Aby mix so he's always been a long thin cat. I've always noticed this on him but I never really thought much about it. I can even feel his microchip which scared me at first because I thought it was some kind of a lump.

[Emeraldgreen]

All my guys have a bit of extra padding except for Oliver and he does have a bit of ridge.