Walnut Hills Farm, a horse breeding operation in Kentucky is using oxytocin to connect foals with foster-mothers while their real mothers are being bred elsewhere.
It's nice that they are using rescued horses as the foster mothers, "giving them a new lease on life," as the article in TheHorse.com says.
But, hold on a minute, this doesn't mean that we can necessarily improve the attachment of moms and babies with oxytocin. It's more complicated than that. After all, in hospital births, women are routinely given a large amount of pitocin, an oxytocin analog. And if anything, it seems to inhibit the natural attachment process.
See The Mother/Baby Attachment Gap for more on this.