Totally agree...

as said some signs might be so subtle one may not notice... to me no animal acts unprovoked or for a reason...

an aggresive dog acts upon reaction...

I got bitten by a dog once... totally my fault... but it was the dogs fault to everyone elseīs eyes... he was at HIS home and was wagging, so I went pet him adn reached through the fence (totally intruding HIS home) logically he bit me... not hard just a nip but still everyone freaked and wanted to call AC... I mean.. what can anyone expect from a dog thatīs protecting his house from an intruding hand...not considering I was not molesting him nor was I a "bad" person or had mean intentions.. the dog simply reacted acordingly...

thatīs no reason to put down a dog...

in the case kokopup mentioned... I donīt think thatīs a dog worthy of being put down... that dog had "manners" toward his family (the kids that for brief periods played with him and the lady that fed him) but non at all towards stragers.. and that is a lack in socialization that definately turned him into a charging "beast" in outsiders eyes... a dog that didnīt know to respect creatures (goats) or just had prey drive... this dog with proper training shouldīve been great.... just as any dog