Linda,
One basic concept to keep in mind is to put the shoe where you want the foot
to grow. In this case the shoe should stick out slightly (1/8 inch) along the
quarters with no nails "beyond the turn". The heels will gradually spread.
Meanwhile, don't allow the shoer to curl the ends of the shoes up under the
foot--instead, let them trail straight back, sticking out slightly behind the
bearing surfaces of the hoof wall. Finally, in general, with a fresh shoeing,
there should always be some shoe beyond the hoof, all the way around. Putting
on a shoe that is too small, then rasping down the hoof to make a
neat-looking job is what I call "horseing the shoe". You can expect all sorts
of problems from this kind of technique.
ti