The fungal skin disease dermatophytosis has come to be called ringworm because of the appearance of the skin lesion that characteristically occurs with this disorder: a circular area of hair loss with a red, raised outer rim. These lesions result from an inflammatory reaction to the fungus. Most often, dogs and cats are infected by the Microsporum canis fungus, but other types of fungi cause ringworm infections as well.
Sarcoptic mange is one of the most uncomfortable skin diseases that a dog can contract. Highly contagious, sarcoptic mange is caused by a mite called Sarcoptes scabeie var. canis and is transmissible to humans. These mites burrow into a host animal's skin, causing scaling, yellowish crust, hair matting and loss, and severe itching
Usually an acute onset of nail loss. Initially, one or two claws are lost, but over a course of a few weeks to several months, all claws slough.
Includes: lethargy, weight loss, fever, decreased appetite, and coughing.
Often involve the gums, tongue, palate, throat and lip as well as the nose, eyelids and even the eye. These lesions usually appear as white to gray, cauliflower-like masses.