Your pet's claw has blood vessels known as the 'quick'. It is important that you do not file down to this area. It is easy to locate the quick on animals with light coloured claws. For those with dark coloured claws it may be easier to locate the quick by looking on the underside of the nail - however if in doubt seek the advice of your vet or pet groomer.
Hold your pet's foot carefully and ensure that you are in complete control before starting to file the nail. Try to file in one direction using a smooth action.
Keeping your pet's nails trimmed is essential for good care and grooming.