The incident occurred last night when the mini-truck's driver identified as Nabbu Khan, a resident of Muzaffarnagar, was transporting the hens, Additional Superintendent of Police (rural) Jagdish Sharma said.
The vehicle carrying the hens was hit by a truck from behind due to which it overturned, he said.
Nabbu was injured in the accident while 200 hens died on the spot, the ASP said.