Oh, okay. Well in that case, is it in its natural form, an element of the periodic table? A chemical of warfare? Explosive? Corrosive? Noxious/Poisonous?
Also, how was it manifested? By spitting? Skin secretion? Some other means?
And is the power directly responsible for the dog's death, or did it render the dog incapable of defending itself/alerting the others? If so, is it Narcotic Emission?
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)