The callus-like thing on the cat’s meat pad may be caused by trauma, skin disease, or thickening of the meat pad tissue caused by friction. First of all, check whether there are any redness, swelling, dander, scabs, etc. on the cat's meat pad. If so, you can apply ointment to the cat to treat fungus. During the treatment, the cat should wear an Elizabethan ring to prevent the cat from licking; if it is trauma or friction Don't worry if it causes it, it will not affect the cat's health.