Thread: A Scaury Gost

It is quite possible that it is badly parasitised, the face looks swollen under the jaw (bottle jaw) which if that is the case, is caused by fluid as a side effect of parasite infection.
You did the right thing to 1) shoot the dirty infected bastard and 2) discard it.
It is not likely to have a scour like that from grass because it is not shut in a paddock and has a choice of harder feed it can go to, to balance it's diet. A sure sign that something is wrong - the other three were fine.