One of my chins had a toe injury this past August. She had some bone exposed. It did end up getting infected and the vet placed her on antibiotics. It was also recommended to get the toe amputated a week later.
I soaked her paw in epsom salt soaks twice a day for about a week. Luckily...
I have seen places that sell outside ramps for the bottom of the FN. If you go that route, you should probably wrap it in fleece to keep your chinnies toes safe.
Here is a link to one site.
http://www.ferret.com/item/exterior-ramp-for-ferret-nation-141-and-142/651096/
Also, do you have a...