My dog's black nails grow fast. Should a vet clip and cauterize?

Just like people, dogs' nails are constantly growing. Some dogs require nail trims as often as every 2 weeks, but if a dog spends more time walking on concrete, they may be able to go several months between nail trims. Concrete acts as a bit of a nail file, so the abrasive surface can help to file nails on dogs of all sizes. Since you're nervous about clipping Kiki's nails, you may want to try using a Dremel to help file them. Some dogs are afraid of the loud noise, but others are more agreeable to this than clipping - the only way to find out is to give it a shot.

Since you're uncomfortable clipping her nails at home, the only other option is to continue taking Kiki either to a groomer or a vet every few weeks/months to have her nails clipped. There's a blood vessel (often referred to as the quick) inside of each nail, which is what can bleed if it's nicked. You can use styptic powder from the pet store to help cauterize any mild bleeding that may occur, which is the same thing that your vet would likely use. More intensive cautery is rarely needed for nail trims. It's extremely uncommon for vets to intentionally cut the nails back short enough that they'd all bleed because this is extremely painful and largely considered to be unnecessary. Sticking with frequent trimmings is enough to gradually help the quicks to become a bit shorter.