In 2018, the FDA began investigating whether the increasing popularity of grain-free dog foods had led to a sudden rise in a potentially fatal heart disease in dogs.
Four years later, the FDA has reached no conclusion, but the publicity surrounding the issue has shrunk the once-promising market for grain-free dog foods.
A six-month investigation has found that a tangled web of industry funding and interests influenced the origin, data collection, and course of the FDA study.
Makers of grain-free dog foods and their suppliers, in turn, have exerted pressure on the FDA to protect their market share.
Copyright 2022 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.