Sometimes it may look almost instinctive. I've seen'em come from beyond life it's self and display this willingness to go on. Eveyone at the hog pen knew the catahoula was gone. The hndler picked him up smacked him on his ribcage and he took a big gasp of air and was screaming to get to the Russian boar. It was the most incredible and gmest catahoula I ever seen with these two eyes. This was back in the day.