@Jane&Ziggy when I first got Luka and he didn't trust me as much I used them to slowly shave away feather, I can't believe Sid's beard is tougher than that! There is a knack to them though, play around with the angle and pressure, and I did find I got the odd duff one that wasn't sharp enough to do anything. Poor @Doodle92 I hope Robin isn't offended at being compared to my hairy cob!