The respiratory system functions to exchange oxygen and carbon dioxide during respiration (breathing). The respiratory tract consists of the upper (nose and nasal passages) and lower airways (trachea, bronchi and lungs).
Flea allergy dermatitis (FAD) is the most common allergy that affects cats. It occurs when a cat develops hypersensitivity to proteins (allergens) in flea saliva, which is injected into the cat's skin during a flea bite.
There are few things more frustrating than having a cat that is suffering chronic bouts of vomiting and diarrhea. Vomiting and diarrhea cause dehydration, and if left untreated, can become a life-threatening situation..