Is Sharing Breast Milk Safe? More families are informally swapping milk during the baby formula shortage. But experts warn there are risks. Author: Catherine Pearson Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)MoreClick to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)