Application-based market taxonomy splits demand into canine, feline, equine, and miscellaneous companion animals, with each vertical shaped by disparate parasite pressure, owner compliance, and regulatory thresholds. Canines accounted for 53 % of 2023 global dewormer sales, propelled by higher roundworm and hookworm prevalence in peri-urban parks and the routine โheartworm plus intestinalโ protocol in North America. Felines represent 31 %, yet AR-based unit pricing is 18 % higher because endectocide tablets are off-label reformulated into microsize doses, tightening supply. Equine dewormers claim 12 % of the segment but operate under anthelmintic resistance stewardship guidelines, accelerating rotation strategies that keep volumes flat while value erodes โ2 % YoY. The residual 4 %โrabbits, ferrets, exotic birdsโrelies on compounding pharmacies, producing sporadic, low-volume orders that nonetheless carry >35 % gross margins for active pharmaceutical ingredient (API) suppliers. Across applications, channel archetypes differ: OTC dominance in canines, vet-dispense in felines, and farm-equine direct in equines, informing distribution margin expectations.