Walk him forward, then stop.
If his front (or hind) is in front too far ahead, then slightly bring pressure backward so he will want to take a step back. Add more pressure if needed but try not to be just wiggling the lead a little. As soon as he shifts his weight, release. If he didn't move his foot, try again.
If he brings his foot too far back, bring pressure in the lead forward so he will want to step forward. Add pressure if needed but once again, try not to. As soon as he shifts his weight int he right direction, release. If he still didn't move his foot, do it again.
If you are having a little trouble with the back feet, just bring him forward or back him up slowly until his back feet are mostly in line, then try and work on his front feet again.
🔫 Don't Tread On Me 🐍