Hmmm...I left the Dairy State in 1970 having never tried this, but the cow calling technique sounds akin to the practical projection practicing I've been doing (thanks to the Frankie Armstrong influence) at The Press Room every Friday for the past 25 years. ;-)

Our up-the-hill neighbor's daughter practices opera in their field above us, so we can entertain the neighbors with cow calling and singing from our quarterdeck!

Linn