Fido's Bane is a term used to describe fleas, which are small, wingless insects that feed on the blood of mammals and birds. Fleas are a common problem for pet owners, as they can cause discomfort and irritation to their pets. Fleas can also spread diseases, making them a nuisance and a potential health hazard. Fido's Bane is a term used to describe the annoyance and danger that fleas can bring to pet owners and their pets.