I've looked on Google for quite a while now but can't find a picture of a day old chicks foot!

If you look very carefully both males and females have the Metatarsal spur, it may be very difficult to see in some breeds, I have done it with commercial layers and show bantams.
its just a tiny bump you probably wouldn't notice unless specifically looking for it

We used a hot wire, basically it was a soldering iron with a very thin red hot wire and it was just touched onto the spur for a second to burn it away.
If any weren't burned properly the spurs still developed or half developed but it was rare to miss one.
Like the beak trimming, the chicks don't appear to show any sign of distress from this and carry on as normal.?
But ideally you need to be working with sex linked or sexed chicks.