The Veluwe is the largest continuous forest area in the Netherlands, located in the province of Gelderland near the Veluwemeer. In the reserve Planken Wambuis, a herd of Sayaguesa and some miles away also a herd of Tudanca are kept freely all the year round. At first, only New Forest Ponies were kept in the reserve, but the feeding activities of the horses did not stop the increase of birches, so cattle were added in 2005. At first there were Highland cattle, which were only a temporary solution, the Iberian breeds were added later on. The Sayaguesas arrived in 2006, the Tudancas in 2008. I don't know if they keep the Tudanca and Sayaguesa separated, but there are some adult Tudanca x Highland crosses, even a bull among them.
Down below you have some beautiful photos of the cattle living in the reserve. The lowermost Tudanca bull is very surprising because of his black colour without a grey saddle.
Tudanca x Highland:
And here is a video: