i use super 5 supplement from wellness. it is not synthetic so they can't overdose. compared to missing link it is better. all natural. a great product. you sprinkle it on their kibble. kibble alone is not enough because it's so processed. romeo's skin and coat has never looked better and he is very heal
thy. he loves the taste.
http://www.oldmotherhubbard.com/dogs...Sup5Supplement