White spinal mark

[kwaka]

No idea what this is. 2yr old stimmy. Shed 2 days ago. Noticed this mark just down from his head a week or two ago. Thought it'd be a scratch that would clear up when he shed, but no change. Anyone else seen this kind of mark?

 

[Vixen]

Looks like a rub mark, is there anything she could be squeezing through? Logs etc

 

[sacred_DUC]

Looks like a rub mark, is there anything she could be squeezing through? Logs etc

most likely rub a little hard, seen this few times on my olives usually clears up on next shed