I just saw on the news that a german shepherd got sent a jury duty notice. It happened due to a computer glitch. German shepherds are pretty smart. I think he could have done the job. Of course he didn't have to show up. Which leads me to wonder if a Furry could get out of jury duty by saying "Sorry, I'm not human. I'm a fox" Or whatever your species happens to be. I imagine that they'd expect this theoretical Furry to prove it in which case he shows up in a fursuit and says "Told ya"
He'd probably get tossed in jail for contempt or something. Unless the Judge had a sense of humor. In which case he gets off just for having the guts to do it.