Robotic milkers

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2. A big benefit is that it's voluntary

The robots attach themselves to the udders. Once the cows and robots are fully trained the robot can handle the milking with minimal human intervention. That will free up my dad, brother, and uncle to do other things (mom's already assembling a to do list). Plus it's beneficial for the cows because once the cows get used to the robots they'll be able to voluntarily come up and get milked when they're ready instead of on the farmer's schedule.

Another farmer in the area who went to this system reported his cows gave a lot more milk on the new system. (And since we don't have a dog we don't have to worry about the dog chasing cows away from the robot like the other farmer's did).

The sparks you referred to were probably the lasers - the robots use lasers to help them attach properly to the udder. They show up on video as flashes.