Food to craft horses?

Hi guys,
I found a new horse and put it into the stable… But it don’t work. What I have missed? Do I need some special food? In the wiki stands one foal and one plant fibre.

Is that the stable building or the new one place animal pen?

Oh it looks nearly the same i don’t reconized that I build the new animal pen :joy:

Thank you

Believe me you are not the only one to do that.

Yep, Done this several times in fact. XD