I found this log snippet from Dio's. The trip echo indicates that Koil has a hindpaw, even though she is not a felar. Maybe felars shouldn't get this echo when fighting non-felars or the echo could mention behind Koil's what?

You swing your hindpaw behind Koil's, pulling her down with a quick jerk!
You step out of the shadows.
You trample around loudly again.
Your trip scratches Koil.
Koil yells 'Help! Sria tried to trip me!'
Your shield blocks Koil's crush.
You step inside Koil's punch with a quick backfist.
Your claw DISMEMBERS Koil!
Your shield blocks Koil's punch.
You parry Koil's punch.
Your claw decimates Koil!
Koil has a few scratches.

n/t