Thank you for your question. As a rule, mats bigger than your thumb need special care. Your pet's skin is very delicate and thinner than yours, so if your pet is severely matted, it may be wise to consult a professional groomer. Smaller mats can be broken apart with a mat rake or matbreaker. Larger, more involved mats must be cut out with scissors. Be careful. It is easy to cut your pet. We recommend caring for the mats prior to using a clipper to remove them, in order to avoid harming your pet.