how do you train a hog to stay out of a trap

i havent even seen a pig track in a couple months. I thought it might be temporary used to be alot of sign. leaves churned etc. all i hear when some one finds out i have dogs is, how many this one or that one caught the other day just east of me their gone and there used to be tons of them there.Its sad for me and my doggy's good for the landowners I guess never saw any permanent damage done its rocky hilly ground. if they root up a pasture it looks the same as before in a few months. I could understand what row croppers would have against em but besides a rooted hay field once in a while I dont know why the ranchers hate em so much. I think its from publicity from places they hear about where they are over run. rather than actual damage. they all love catching em now their about gone. I have never released one myself because i dont want to be in a position to have to lie about it. I am tempted to move to texas but if i suggested it my wife would know why. I hate deer now their just trash game. i've been finding several dead ones too. i cant figure out what killed em.............got to go more later.