One of my turkeys broke a toe a while ago as well. Can you catch him/her and take a closer look? Does it look infected? Is there a "break site" where bone is sticking out? Is the toe still completely attached, or is part of it dangling? Any open/exposed areas?
For right now, if there's anything exposed/sticking out, then I'd just try to apply some neosporin/antibacterial cream and keep an eye on him/her. Make sure there's no pus or discharge coming from the area (if there's anything exposed) and if it's just swollen, pay attention to make sure it's only swelling due to inflammation and not due to bacteria under the surface. My bird's toe was ripped in half and dangling, so I had to remove it a few days later. She's perfectly fine now, but she was limping for a few days.
I think that your bird will probably be limping for a while (week or more) depending on how big the bird is (more weight=more stress on feet= more pain) and how bad the break is. As long as the toe doesn't look infected or gangrenous, I'd leave it alone and just make sure the bird is eating and drinking and not getting picked on for limping around.