How old do dogs need to be fed trace elements?

In fact, there is no fixed time limit for feeding trace elements. Just like calcium tablets, supplementing trace elements can also be used as a daily health care, and trace elements do not need to be fed every day. If the dog is healthy and has no abnormalities, it can be maintained for a week. 2-3 times. But if pica occurs, it is best to take it twice a day.