Board Thread:False Info and Speculative Discussion/@comment-27547895-20160203212624/@comment-26879545-20160212175447

I'd imagine the smell of fire, smoke, burning skin, blood and antiseptic would throw off any scent the human form would have given off. Similar to why Theo couldn't track Lydia and Valack using scent when they were in the tunnels. There were too many smells and if something is strong enough to overpower it, they can lose the scent trail.

It could be that, or it could have been no use because the Dread Doctors are still protecting the Beast and just happened to whisk the chimera off after they sent Parrish flying into a wall.