[Rosen eyes him oddly, not sure for a moment if Pratt is being serious about spider deer or not.]

....yelled?

[Then he addresses the question posed to him]

All things are 'poisonous' in their extreme. [A pause] And for the moment neither of those are ideal options.

[He's not ruling them out either...just...perhaps he can think of something else first. That odd little man at the lab might have something that could be of use...]