they have all kinds of seals and plastic encrusted shit for exactly that reason. seimi's proposal to use lassoo is the right level of response for these things. bolas too. big bolas with heavy weights, ideally you tangle them around two limbs and then you look for the biggest part of it and put a bullet through it. or hammer it with a metal pole or rebar or something. the head is not going to be where the brain is, most likely it's where an animal has a heart