Europe has been breeding tauros cattle which are as genetically similar to extinct aurochs as they can get.

Taurus cattle have been introduced to various European countries to graze and return soil to their natural conditions. Now they are going to the highlands of Scotland:

https://www.goodnewsnetwork.org/herd-of-bulls-headed-to-the-highlands-to-recreate-effect-of-ancient-oxen-on-scottish-soil/