the predator angle was this biggest plus doing this. The area would be 3ft by 12ft, with an attached run outside. We plan on free ranging, but when we are home, as we live in the woods, and have many predators, as well as a nesting pair of eagles. they are the biggest pains, let me tell you.
They swooped the rabbit my daughter was holding last summer - good thing she is feisty lol. She stood up and yelled at the bird, then ran into the house lol.
We also have 2 shepherds, which helps a bit.
Should I have concerns housing them together with the horses? Haven't done this before - so I don't know. I would imagine it would be ideal as my horse will (and has already) kill any dog (or coyote, etc) that came near (we have had to train ours to stay out of horse areas) plus, there is already electric out there - and shut up in the winter time, it stays about 40 degrees f in there, on average. I basically want to make sure that neither species will end up sick as a result of exposure to the other - again, never done this before. We have 16 wyandottes, looks like 9 are boys :-\ . hoping for around 12 or so in that space, adn trying to make "room to grow"