Newborn calves at Faia Brava, Portugal

Faia Brava is a reserve in Portugal that houses one of the two Iberian Tauros cattle herds. So far, this herd is composed of rather nice-looking Maronesa cows and two Sayaguesa bulls that have been added last year. Now, a few newborn calves have been spotted. It is unclear whether the Sayaguesa bulls are the fathers of the new Tauros cattle yet. 
Go here for the article on Rewilding Europe.
The Maronesa cows have a good build and the horns are ok as well, but their colour is pretty dark. I think that they will have to add a breed that contributes a more definite sexual dichromatism in the future, and they might also need more horn thickness. I don't know how large the bulls and cows are, but I estimate the cross bulls might reach a size of 150 cm or so, but this is just a wild guess.