Merck Boss Pour-On is a non-systemic, topical insecticide formulated with 5% permethrin for reliable cattle fly control and lice management. It controls biting lice, sucking lice, horn flies, and Rocky Mountain wood ticks on beef cattle and on lactating and non-lactating dairy cattle. It also controls sheep keds and lice on sheep, making it a versatile choice for livestock health products. Available in 900 ml and 5 L sizes, this pour-on insecticide supports effective tick control for cattle and sheep lice treatment when used as directed.
Boss Pour-On
Boss Pour-On
Merck Boss Pour-On is a non-systemic, topical insecticide formulated with 5% permethrin for reliable cattle fly control and lice management. It controls biting lice, sucking lice, horn flies, and Rocky Mountain wood ticks on beef cattle and on lactating and non-lactating dairy cattle. It also controls sheep keds and lice on sheep, making it a versatile choice for livestock health products. Available in 900 ml and 5 L sizes, this pour-on insecticide supports effective tick control for cattle and sheep lice treatment when used as directed.
About This Item
What parasites does Boss Pour-On control?
Which animals can I use Boss Pour-On on?
Is Boss Pour-On a topical or systemic product?
Do I need a prescription to purchase Boss Pour-On in Canada?
What is the active ingredient and strength?
What sizes does Boss Pour-On come in?
Pet Health Benefits
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Pain Relief
Vet-approved medications to reduce inflammation and ease joint or post-surgery pain
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Supplements and meds that help manage blood pressure and support cardiovascular function
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Vaccines and immune-boosting supplements help reduce the risk of serious illness
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Dermatology products and omega-rich formulas promote healthy skin and a shiny coat
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🐾 Marcus L. - Toronto, ON
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"As a cat mom managing ongoing medication, PetMeds has been a total game-changer. They make refills automatic, and I always get a heads-up before anything ships. So reliable!"
About PetMeds Direct
PetMeds Direct was founded with one simple mission: to make pet healthcare easier, faster, and more compassionate for Canadian pet parents. What started as a small idea — helping busy families manage their pets’ prescriptions — has grown into a trusted nationwide pharmacy serving dogs, cats, and everything in between. We believe pets are family, and every tail wag and purr deserves top-tier care. That’s why we work closely with vets, offer fast shipping, and make prescriptions and wellness products more accessible than ever. At PetMeds Direct, we’re not just delivering meds — we’re delivering peace of mind.
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Caring for your pet’s health has never been easier. With just a few clicks, PetMeds Direct delivers trusted medications and wellness products right to your door — fast, affordable, and vet-approved. Say goodbye to last-minute pharmacy runs and hello to peace of mind.
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