Mats can be difficult to remove and may require the pet to be shaved. Removing a heavily matted coat can cause nicks, cuts, or abrasions. Heavy matting can also trap moisture and urine near the pet’s skin, allowing mold, fungus or bacteria to grow, and/or revealing skin irritations that existed prior to the grooming process. After-effects of the mat removal can include itchiness, redness, self-inflicted irritations or abrasions, and failure of hair to regrow. In some cases, pets may also exhibit brief behavioral changes. In the case of discovering matting that I unable to be humanely brushed out, I will contact to let pet parents know what is happening, and proceed to remove matts.