Dutch cows are an excellent dairy cow breed that is mainly used to produce milk. If Dutch cows are no longer used to produce milk, it may be due to one of the following reasons:

1. Changes in market demand: As people's eating habits change and the demand for healthy food increases, the demand in the milk market may have changed, resulting in Dutch cow breeding and milk production no longer being economically profitable.

2. Disease issues: Certain diseases may affect the milk production and quality of Dutch cows, which may lead farmers to decide to stop milk production.

3. Cost issues: Breeding Dutch cows requires a lot of money and effort, including feed, veterinary care and facilities. If the cost is too high, farmers may decide to stop milk production.

It should be noted that the above are just some possible reasons, and the specific situation may vary depending on the region, farmer and market conditions. If you are interested in the specific situation of Dutch cows no longer producing milk, it is recommended that you learn more about the relevant agricultural and dairy information, or contact local agricultural experts or relevant institutions to obtain more accurate answers.