Animal breeding

As of last night I am now the proud owner of a brand new cow and a brand new pig.
The multi-server I am on allows no plug ins and limited creative. We do things the hard way.
I built a large metal grate cage in 4 compartments. Two pigs in one side, 2 cows in the other.
Getting the critters to mate wasn't as difficult as trying to name them. The window comes up, type in the name and then try to close the window. Not clicking outside the border, or esc. or enter worked. I'll try again today.
Just wanted to say that this is just an amazing feature. I love this game.
I have to click in just about every day just to see what others on my server have done, what's on this forum, and what's coming next.

Not the grated doors but the grates that I think are labled 2x4 grate.