The cut is halfway / quarter way from base of tail, about a cm long, it's not infected or red but fur is being lost, with even a bald patch directly around the cut with fur loss seeming to spread.
It doesn't seem to bother him, will occasionally see him cleaning it but that's it...
What should I do? Does it sound like he needs the vet? It's been like it about a week, and as I said, doesn't appear to be bothering him...
Would appreciate any advice... TIA