RENSSELAER COUNTY, N.Y. -- Cows digging in at Tiashoke Farms and if you make as much milk as these guys do, there's no wonder they eat so much.

They also do a lot of something else and leave plenty of it behind. And the gases associated with what's left behind could have farmers paying.

“It's a natural process to the dairy cows,” said Brian Ziehm, owner of Tiashoke Farm. “It's nothing we have control over. It's just another added expense.”

A recent Supreme Court decision allows the EPA to use the Clean Air Act to regulate greenhouse gases. The New York Farm Bureau says for each gas producing animal, you would you'd need a permit and the new regulations would mean $175 for each of Zhiem's cows.

So if the plan goes through, Tiashoke Farm would have to pay more than $100,000 for its cows. And for a small farm, that is pretty big price.

“Ag is a very small part of the emission portfolio and to treat small farms as large polluters doesn't make sense to us,” said Jeffery Williams, Deputy Director of Public Policy for the New York Farm Bureau.

“The added cost is going to make them make a decision and it is probably to go out of business,” Ziehm said.

In the new rules, other livestock, like pigs or beef cows, would cost less. Right now, nothing has been put into law and even the EPA is lukewarm on the idea.

The EPA Administrator said in a report this summer the Clean Air Act is ill-suited for the task of regulating global greenhouse gases.