Shake Shack and BurgerFi are the Only Burger Chains to Get an A on the Annual Antibiotics Report Card

The industry has evolved over the years to meet the demands of today's diners. Consumers have made it clear that they expect higher quality food product from restaurants.

With that being said, this has fueled the better-burger movement.

But this sector has quickly become competitive with so many brands for the consumer to choose from. There’s Shake Shack, Five Guys, Shula Burger, Burger 21, BurgerFi and so many more in the mix stealing away customers from McDonald’s and other quick-serve burger joints promising a better-burger burger product.

According to the latest antibiotics report card, only two burger chains out of the 25 graded received the grade A–BurgerFi and Shake Shack.

These chains are the only ones on the list serving antibiotic-free beef.

"What's interesting about that is they also happen to be what I think of to be these younger upstarts that are disrupting the normal kind of operational model that burger chains have use for decades now, and customers are really responding to that," said Lena Brook, lead researcher of the report to "CNN." "They are being rewarded for the good food that they are serving and the good practices that stand behind that food, and serving responsibly raised beef is a part of that new business model."

But all the other chains graded, including Wendy's, McDonald's, In-N-Out Burger–all received a D minus or F.

Wendy's responding that the company is working toward its goal of serving only antibiotic-free beef and pork.

"As we go forward, we have a goal of eliminating routine antibiotic use in our beef and pork supply, while protecting the need for targeted, therapeutic use of an antibiotic in the limited cases where a sick animal needs to be treated individually, or in the unlikely case that animals have been exposed to an illness and treatment with an antibiotic is necessary to prevent a disease outbreak," said Liliana Esposito, chief communications officer for Wendy's wrote in a blog post.

In-N-Out said in February 2016 that the company is also aiming to try to eliminate antibiotics in its beef products, but according to the report, the QSR chain has yet to report on its progress.

Read more about the report at "KTLA" now.

Earlier in the year, we sat down with Shack Shack CEO Randy Garutti to see how the chain has become a fan-favorite and some of the brand's secrets to success.

Check out The Barron Report podcast episode below.