It looks like Alger had an abscess on his tail. There's a scabby spot with fur missing from around it. Most likely he got it bitten in a fight,probably with Tommy Two-Tone, who is still hanging around despite the fact that I've gone back to chasing him off every time I see him. Alger and Farah both avoid spending much time in the back yard, and I'm sure it's because they fear Tommy.
Oh, crap. It's Friday already. Why does the clock run so fast?