History
Even though a lot of research has been done, no one knows for sure where the first cattle that were brought to Jersey Island came from. Most research shows that the Jersey probably came from the nearby coast of France, where there are cattle that look like Jerseys in Normandy and Brittany.
No matter what the correct phylogenetic form of the Jersey might be, it looks like the domesticated ancestor of the Jersey came from Asia, was most likely a Bos brachyceros, was probably tamed during the Stone Age, which was at least 10,000 years ago, and moved to Europe through Central and Southern Europe and North Africa to Switzerland and France. Bos brachyceros and Bos primigenius herds that were pure did breed with each other in Northern France (which mostly came down the North Coast of Europe to as far down as Northern France).
Since Jersey Island was connected to France by a narrow isthmus until about A.D. 709, it seems likely that cattle from Normandy and Brittany were brought over to Jersey Island regularly in the early days. This must have been a very important part of how Jersey came to be what it is today.
Jerseys have been known to live on the UK mainland since 1741, but they may have been there much earlier. They were called Alderneys at the time.
From the 1860s until the First World War, the Jersey cow breed grew the most around the world. For a long time, thousands of animals were shipped to the US every year, but records show that the first people who moved there brought Jerseys with them in 1657. In 1868, Canada brought in its first Jerseys. South Africa got its first Jerseys in 1880, and New Zealand's first cattle came there in 1862.
Even though there are no records of earlier imports to Australia, it is thought that the first Jerseys came as "ship cows." In 1829, Mr. J. T. Palmer of Sydney put an ad in the paper to sell 200 pure-bred Jerseys. This was the first time Jersey was mentioned.
Before the turn of the century, the first Jerseys were brought to Latin America. The first cattle went to Guatemala around 1892, according to records. Four years after that, Brazil got its first jerseys. But it's likely that Costa Rica was the first country in Central and South America to bring the breed there in 1873.
The Jersey breed is the second most common type of dairy cow in the world today. On Jersey itself, there are less than 6,000 cows, and almost 4000 of them are milking cows that are old enough to work. A strict ban on imports keeps the breed on the island as pure as possible. Since about 150 years ago, this rule has been in place. On the island, there are no other kinds of cattle.
Jerseys are known for their high-quality milk, which is especially full of protein, minerals, and trace elements. It also has a lot of colour, which comes from carotene, which is an extract from grasses. Jerseys can get used to many different climates, environments, and ways of being cared for.
Characteristics
Statistics
Equally comparable
Calving: Jerseys in the United States were found to have nearly 20% more easy calvings (with a very low incidence of very difficult calvings) than other, larger dairy breeds evaluated in the same study, regardless of lactation, according to a study from the USDA in 2005.
In 2005, the Canadian Dairy Network said that 96% of Canadian Jersey cows in their first lactation and 99% of cows in subsequent lactations gave birth to their calves without help.
Condition and Distribution
Several studies have found that Jerseys are less susceptible to mastitis than Holsteins; for example, in Florida's dairy herds, mastitis and udder disorders were more common among Holsteins (51% versus 22%) when compared to the number of cows that needed treatment (100).