I took the deadly chill feat for my cleric. I summon a skeleton and look at his stats and see he has two attack stats. 1st is normal attack with no cold and 2nd is the attack with cold (skeleton only gets one attack per round). I go into combat and see that my skeleton inflicts cold damage (so far so good). I have the skeleton try to break open a chest and he stops using the cold attack (reverts to 1st attack stats). Why? The feat says that all undead summoned get +1d6 cold damage added. It says nothing about having no affect if used to bash.
Is the feat description missing details or is it not working as desired?