bomb chickens

summon a bomb chicken. (AC 12,  HP 1d8+2, str  2, dex 14, con 8, int 2, wis 12, cha 6, passive perception 9, language -, challenge 0(10 XP)). whenever the chicken is within 5 ft of anything the summoner considers an enemy it will lay a bomb witch it itself dose not take damage from, the chicken will loosely follow the summoners commands. The chicken will stay until it is dispelled or dies. Most people will not recognize that the chicken is special and not pay it any mind until it of course shits out a bomb and blows up its friends. 

bomb ( Each creature within 5 feet of that point must succeed on a DC 12 Dexterity saving throw or take 3d6 fire damage.)