The actual kick-off of ProCROSS was done by a group of Californian Dairy farmers. They decided to use several dairy breeds on their Holsteins. Since their focus was on milking healty cows they did not make meeting reports. Six dairys started to crossbreed around 2003. They found out that Montbéliardes and VikingReds where the most profitable breeds to use.
In the summer of 2013, during the 3rd ProCROSS convention in Portugal, the 10th aniversary was celibrated. Many international distributors and farmers attended the program.