The term 'Canine Irritant' can be summarized as a FLEA, which is a four-letter word. Fleas are small, wingless insects that feed on the blood of mammals and birds. They are a common nuisance to dogs and cats, causing itching and irritation. Fleas can also transmit diseases, such as tapeworms, to their hosts. FLEA control is an important part of pet care, and there are many products available to help keep fleas away from pets.