Join Date: Dec 2009
Location: East Midlands, UK
I'm always altering things - roughly and by hand mind, but they never end up looking too shabby in the end! I don't think I have any pictures of my altered wares (mainly horse things) as I tend to do it for convenience hehe.
I would measure the height of your pony's ears (roughly) and measure the length of the bonnet ears. Mark on with a pencil/chalk (on the inside of the bonnet) your pony's ear length, then add 1cm to the height (this will give you stitch room)
From the top of the newest mark, faintly draw the curves in an ear shape until you get to the edge of the material. Sew a few mm around the edge of this line. I'd do a backstitch, or a tacking stitch if you're unsure of the sizing, and then backstitch when you're happy with the sizing (and removing the tacking stitch afterwards)