Veganism and paleo may be completely opposite dietary lifestyles, but their supporters seem to find common ground on one issue: Adherents of both diets think it’s really, really weird that humans are the only creatures on Earth who drink milk past infancy.

Conversely, almost everyone, regardless of dietary affiliations, seems to think milk is a solid option for babies. Notable proponents of breast-feeding include The World Health Organization, The Centers for Disease Control, The American Academy of Pediatrics, and the U.S. Surgeon General. In lieu of that, dairy-based formulas are considered the status quo. Even Paleolithic infants—before they were old enough to hunt buffalo and gather low-carb, gluten-free energy bars—drank their mothers’ milk.

In his new cookbook for babies, Bubba Yum Yum: The Paleo Way, Australian celebrity chef Pete Evans doesn’t outright condemn breast-feeding, but he does recommend some sketchy alternatives for feeding young infants. One of his paleo formula recipes is a broth made with chicken bones, chicken feet, mashed-up liver, and apple cider vinegar. According to Australia’s Federal Health Department, such a formula would contain 10 times the amount of vitamin A that a baby should be consuming.

“There appears to be recommendations not to use either breast milk or an approved infant formula, but to provide other foods to infants under six months of age, and that really is a big health risk,” Heather Yeatman of Australia’s Public Health Association told ABC News. “In my view, there’s a very real possibility that a baby may die if this book goes ahead.”

Bubba Yum Yum does feature a disclaimer, saying, “although we in good faith believe that the information provided will help you live a healthier life, relying on the information contained in this publication may not give you the results you desire or may cause negative health consequences.”

But a warning that basically says “Hey parents, this book might harm your kid!” hasn’t been enough to quell public safety concerns. According to The Australian Women’s Weekly, the Federal Health Department is “concerned about the inadequate nutritional values of some of the foods, in particular for infants, and is investigating further.”

If you decide to pick up a copy of the book when—or rather, if—it gets published, make sure to cool down your baby’s bone broth before putting it in the sippy cup; no one wants to do burpees with a burnt tongue.