Technically speaking, the cows were checked, but too unreliable way. The cows were checked if radioactive materials were sticked to their skin or not, and hearing investigation was conducted. The farmer who sold the cows told to the investigator that they obey the guideline. I have to think Japanese government must have no idea that not-potician citizen can tell a lie and cows can be showered.
Anyway a lot of cows' images have appeared on tv monitor, news site, etc.etc. Watching living cows going to become meat is disgusting.
I have not eaten cows more than 15 years intentionally. It is not easy to avoid eating cow. Cows are used in many foods. Beef fat, gelatin etc. etc are used in many cooking.
The each reason is quite different but I don't want to eat radioactive food as well as dog, cat, cow, etc. etc. etc.
I am sorry Japanese children have to eat radioactive food and cows through their school lunch.
Meat of cows fed in Fukushima was found to be contaminated by radioactive cesium.
Radioactive material were said to be ingested through hay. The hay were left outside until April (the explosions were happen in March 12th, 14th, 15th.).
The farmer sold other unchecked cows already and the cows were brought to the prefectures which were very far from Fukushima.
Contaminated foods are being spread to all over the Japan like this.
Japanese government are planning to screen all the cows in this area before sipped.
Almost all Japanese are wondering why the unchecked beef from these area can be sold.