A little chalk and a lot of beef. That's about all one central Iowa farm girl needed for one of the most unique proposals you'll ever see.Bondurant-Farrar junior Emma Lihs wrote "PROM?" in chalk on the side of a cow she's raising and took it by trailer to her boyfriend Wyatt Carlson's house. Carlson, a senior at Dowling Catholic, shared a photo of the proposal, which showed him holding a sign Lihs designed. "I'd have a cow if you said yes," the sign said.His answer? Yes, of course.» Download the free KCCI app to get updates on the go: Apple | Google PlayGet the latest headlines from KCCI More unique promposalsTeen gets creative with farm field prom proposalIn Iowa, Beto O’Rourke answers 'promposal''All of this, just for you': Heartwarming 'promposal' goes viral