The term CANINE WOES can be summarized by two crossword solutions: FLEAS (5 letters) and THEBITESOFFLEAS (15 letters). Fleas are small, wingless parasites that feed on the blood of mammals, including dogs. They cause itching and discomfort for their hosts, and can spread diseases such as tapeworms. The bites of fleas can cause skin irritation and allergic reactions in some animals. Fleas can be difficult to get rid of, and require a combination of treatments to eliminate them from an environment.