Oklahoma Governor Mary Fallin has proposed levying a sales tax on horse sales in that state. Opponents of the plan say eliminating the current horse sales tax exemption would cripple the state’s equine industry, which includes multiple breed national and world shows and their related horse auctions.

Fallin’s press secretary, Michael McNutt, said the state currently levies a sales tax of 8.357% on livestock, but horse sales are exempt. Lifting the exemption would contribute $1.3 million to the state’s general fund, McNutt said.

The contribution would help reduce a $1.5 billion deficit in the state’s budget.

However some of the plan’s opponents say extending the tax to horse sales will cause unintended consequences