[4] One of the first polled Holstein was a bull named ‘Lophelias Prince’ born in April, 1889.
[5] Most of polled Holsteins living today originated from Elevation Sophia EX93 from Pennsylvania, US born in 1974.
Thirteen single nucleotide polymorphisms (SNP) are connected to the polled trait in Holsteins.
[7] SNPs went through polymerase chain reactions and digestion to determine that SNP AC000158 is highly correlated with polled Holsteins.
Consumers view dehorning as a painful process to calves and often animal welfare issues may arise or public intervention.
Having polled Holsteins removes stress of consumers which ultimately benefits farmers.
The first polled Holstein sires used for artificial insemination (AI) started in the early to mid 1900s.
[5] Polled Holsteins had been seen more regularly in countries such as Germany, Egypt and Great Britain before accumulating in the Americas.