The term 'Target of Some Collars' can be solved by two crossword solutions: FLEAS (5 letters) and FLEA (4 letters). Fleas are small, wingless insects that feed on the blood of mammals and birds. They are known to be a common nuisance for pets, such as cats and dogs, as they can cause itching and irritation. Fleas are also known to be the target of some collars, which are designed to repel or kill fleas.