I have a gopher, how do I kill it?

well my old man said earlier to use the gopher gassers and another said the exhaust trick,in theory this is to work very well if you can locate all the holes in the surrounding area and plug them up so they get the highest concentration of gasses.but i think if you can get some bait food in the holes soaked in antifreeze it would f#$k him up good,i think any of the new antifreeze wont work cause there was a law passed that the co.'s had to put in an additive to make it bitter cause people were killing their dogs from spilling it.GOOD LUCK or get a jack russell terrier-marianne