Here's tha square clinches. They're pretty thin.
By pulling clips I mean were the shoes heated in the forge and clips made? Looks like keg shoes with clips pulled with a ball-pein hammer. Most factory shoes with ready-made clips don't have a mark (notch) where the clip was actually taken from the shoe metal. In other words, factory shoes are molded with clips. If theses are handmades, they are very good. I was having trouble figuring out if they were handmades or not. The nail crease and nail holes look machined, but the heels and the toe clips look forged. I decided they're factory made shoes, just different than shoes I'm used to seeing.
You mentioned this mare snapped a shoe in half. If a horse breaks a shoe in half, either the shoe was really thin and wore-out, or the steel was tempered extremely hard. So hard that they would've been difficult to shape.
For me if I do the toe nails first, the shoe tends to slide back a little, making the toe of the foot hang over the shoe.