A married Washington state man has been busted for allegedly offering to pony up for a prostitute — for a threesome with him and his miniature horse.

Jad Shipman, 48, ran a-foal of the law for allegedly offering an online escort $440 to come to his Longview home and “have sexual contact with him and his miniature horse,” according to a probable cause affidavit shared by The Smoking Gun.

“I want to watch a gal eat out the miniature horse that I have while sitting on my male member,” he allegedly wrote in twisted messages shared with vice squad detectives.

“Last two gals I asked said it was noticeably outside their comfort zone,” he said while eager to giddy up the exchange to take advantage of his marital home being empty, according to the affidavit.

Shipman contacted the woman, only identified as “Diane,” through TNA Board, which used “for prostitution and other commercial sex purposes,” Bellevue cops said.

When the Bellevue vice squad called on Shipman’s home, they found two miniature horses in the fields — which the accused fetishist’s wife, Diane, confirmed were both theirs.

The couple bought the horses for $365,000 in 2019, according to The Smoking Gun.

During an interview, Shipman “admitted to being TNA Board user ‘TheMalamute’ and soliciting ‘Diane’ to ‘eat out’ or ‘lick’ one of his miniature horses’ ‘private parts,’” the affidavit stated.

“Shipman admitted to having prior sexual contact with animals,” the affidavit said.

He also told investigators he chose “Diane” because she posted “under the ‘fetish’ section and [he] hoped that she would be more agreeable to having sexual contact with him and his miniature horse.”

Shipman was arrested Oct. 17 and booked into the Cowlitz County Jail on one count of first-degree attempted animal cruelty and one count of patronizing a prostitute, The Daily Chronicle reported.

He was released on $1,000 bail and ordered to not stirrup more trouble by having any contact with animals as he awaits his initial arraignment hearing.