Talk:Tattoo/@comment-5455946-20130604143005/@comment-4091815-20130605205444

We've seen Scott recognize another werewolf by scent with Isaac in Shape Shifted but that was the day of the full moon and Isaac was a little crazed after his dad got killed so not in control much.

In season 1 Derek said he couldn't track the Alpha by scent because it would smell different in human form.

Deucalion was in human form when interacting with Scott.

Ennis was partially transformed when Scott saw him the first time and he did know.