Nail fungus is a common toenail problem.
The mobile library visits fortnightly and the Age Concern toenail cutting service calls every three months.
Other fungal infections that respond well to tea tree oil include fingernail or toenail fungus infections.
You can get a clipper that works like a guillotine to cut the nail, or you can get a clipper that looks like a scissors that has a notch on one of the blades for the toenail to sit in.
This opening serves a dual purpose of ensuring that you don't accidentally trim away too much of your dogs toenail while also serving as a collection area for the material that is trimmed away.