Join Date: May 2012
Location: Manitoba, Canada
I've always heard that it's best to let them get to know each other through a fence, or in separate stalls first. That's what I've done with all my horses, anyway. There will probably still be a little squealing and sorting out who's boss, but not as much as it would be otherwise. Plus it lets them get used to their new surroundings a little bit before also getting used to a new companion.
I was planning on keeping my new mare separate from the others for a whole week, but whenever she was in the pen next to theirs all three of them would congregate along the fence and wouldn't leave each others sides! When I moved her for the night they would whinny nonstop, so after only three or four days I put them in together and it went fine. A couple squeals, but no kicks or fights.