San Diego, CA—Petco announced it would stop selling pet food and treats containing artificial colors, flavors, and preservatives, according toForbes.

The process will begin in January, and after May 2019, customers will no longer find brands containing such ingredients on their shelves.

In a statement, Petco said: “The move makes Petco the first national pet specialty retailer to take a stand against such ingredients, reaffirming the company’s commitment to being the lifelong, trusted partner—for pets and pet parents alike.”

Ron Coughlin, Petco’s CEO, told Forbes that “What is best for the pet has always been best for our business. We believe that by being a trusted advisor we can help our customers and lead them to healthier choices. Job number one is doing right by the pets, and we believe the business will follow.”

To help the company’s existing product partners, Petco will work with them to make the ingredient changes necessary to meet its new elevated standards.