Join Date: May 2009
Location: Winnipeg, Manitoba, Canada
I really don't think so. I haven't seen an issue yet. My mare can get real stupid when she's with a herd and she's out of sight (she's fine to ride alone, but if I take her into a stall to tack up, she'll go berserk if nobody is in sight) but I wouldn't say it's affected our "bond". She still comes when I call, she's still happy to chill with me, she just wants her horse buddies to be in sight.
Me and Shay-la own 2 year old fillies that are best friends and prefer to be together, but they still both come running over when they see us, all full of love and affection.
So yeah, keeping your horse isolated DOES make them more "dependent" on you and less likely to be herd sour, but at the same time, if you have a chance to let your yearling have a buddy, I think it's selfish to take that away from her. Horses are social creatures and we just can't be there 24/7. I wouldn't call it a bond, so much as it is they're SO excited at companionship when you show up and free them from isolation, it seems like this really good "bond". But really, you're just starving them of a natural born trait.
I say for sure keep them together. And your current filly will actually help your new filly interact happily with you. Monkey see, monkey do!
I hope God tells her to smash her computer with a sledgehammer.