I used carmens K-9 in my dirthole sets as well as some rotten leftover meat from a wild turkey I killed early in the fall season. A #1.75 will work for most anything, but I would step-up to at least a #2 for coyotes. I had one pull out of a stock #2 once.I used Duke traps. Be sure you read aboutmodifications, and trim the catch down and take out the travel. I used to take out the travel aftersetting the trap bytouch, but be careful!