Types of external dewormers are differentiated primarily by delivery mechanism. The spot‑on formulation dominates, capturing roughly 70% of the market due to its ease of administration, rapid absorption, and broad-spectrum efficacy, which aligns with veterinary recommendations for both dogs and cats. Spray products, representing about 20% of sales, cater to owners seeking a quick, non‑contact application, though they may exhibit lower persistence on the skin and thus command a premium for extended‑release variants. Collar systems, accounting for the remaining 10%, provide continuous protection over several months, appealing to high‑risk environments but limited by higher upfront cost and variable compliance. Each type's share reflects distinct consumer preferences, regulatory approvals, and formulation complexity, influencing overall market dynamics and forecasting models.