I know some ppl give salmon oil, and other oils if their bullies are allergic (I just can't remember what they ate), some ppl prefer coconut oil. What are the comparative benefits of all the oils you can use? Is there one better then the other etc? I use grizzly salmon oil currently, but am not sure if that is contributing to Brie's chin acne so if there are ones better or w comparable benefits, i'd like to experiment. Thank you for any input!