Euro Truck Simulator 2 is getting a new update to version 1.47, introducing livestock trailers as a new feature. These are already available in American Truck Simulator, and now players in ETS2 can transport their own livestock in a trailer specifically designed for this purpose.
The trailers can be customized to your liking: there are various body and chassis options, markings, protection plates/boxes, mudguards, and mudflaps.