Yes, Ma'am. It spread quickly throughout the ship, airbourne, with symptoms ranging from increased paranoia, aggressive tendencies, and the inability to withstand certain habitats to a prevalence toward functioning by basic instinct alone, to feed, hoard supplies, secure territory and procreate. The devolution proceeded from there into physical transformations; indeed as with these creatures, it affected their very DNA.

[ He considers those words grimly, then nods. ]

I shall ask Doctor McCoy if I may prioritise the possibility of returning them to their previous condition.