I'm not certain how I should roll for this but here's what I'm going to try.

First transform to gain the scent ability then roll perception to determine anything about the shiver.

Then Craft (Alchemy) + Lab to test the shiver and work out whats in it.

(my sheet says 5 perception but its actually 8 I just didn't check the class skill box for it.)

Perception roll (1d20+8)[24]

Craft(Alchemy) roll (1d20+12)[31]