Skip to search Skip to main content

Not in the U.S?

Not shopping in the U.S. or plan on shipping to a Canadian address?

Continue to Canada site

Get help from our experts 24/7

1-800-672-4399

Sign InNew Customer? Start here

Account
Orders
Manage Autoship
Favorites
Buy Again
Prescriptions
My Vet Clinics
Pet Portal
Connect with a Vet
CarePlus Pet Insurance
My Rescues

Your cart is empty.

Something missing? Sign in to see items you may have added from another computer or device.

Not in the U.S?

Not shopping in the U.S. or plan on shipping to a Canadian address?

Continue to Canada site

Get help from our experts 24/7

1-800-672-4399

Sign InNew Customer? Start here

Account
Orders
Manage Autoship
Favorites
Buy Again
Prescriptions
My Vet Clinics
Pet Portal
Connect with a Vet
CarePlus Pet Insurance
My Rescues

Your cart is empty.

Something missing? Sign in to see items you may have added from another computer or device.

Dry Food
Wet Food
Fresh Food & Toppers
Veterinary Diets
Shop by Health Condition
Puppy Food

Bones, Bully Sticks & Naturals
Soft & Chewy Treats
Dental Treats
Biscuits & Cookies
Long-Lasting Chews
Jerky Treats
Freeze-Dried & Dehydrated

Health & Pharmacy

Flea & Tick
Vitamins & Supplements
Allergy & Itch Relief
Heartworm & Dewormers
Pharmacy & Prescriptions
Anxiety & Calming Care
DNA Testing Kits

Crates, Pens & Gates
Beds
Tech & Smart Home
Leashes, Collars & Harnesses
Bowls & Feeders
Clothing & Accessories
Carriers & Travel
Training & Behavior

Dog Deals New Dog Supplies Pet Parent Supplies Shop all Dog

Plush Toys
Chew Toys
Fetch Toys
Treat Dispensing Toys
Puzzle Toys
Rope & Tug Toys

Cleaning & Potty

Pee Pads & Diapers
Poop Bags & Scoopers
Cleaners & Stain Removers
Vacuums & Steam Cleaners

Brushes & Combs
Shampoos & Conditioners
Grooming Tools
Paw & Nail Care
Ear Care
Skin Care

Purina Pro Plan

Hill's

Blue Buffalo

Frisco

Royal Canin

Bark

A cut above the rest. Try Maev Raw Food for dogs. Shop now.

Wet Food
Dry Food
Shop by Health Consideration
Veterinary Diets
Highest Quality Food
Food Toppers
Kitten Food

Clumping
Scented
Unscented
Natural
Lightweight
Crystal

Crunchy Treats
Lickable Treats
Soft & Chewy Treats
Dental Treats
Catnip
Cat Grass

Litter Boxes & Accessories
Tech & Smart Home
Beds
Carriers & Travel
Bowls & Feeders
Grooming
Collars, Leashes & Harnesses

Cat Deals Pet Parent Supplies Shop all Cat

Health & Pharmacy

Flea & Tick
Vitamins & Supplements
Allergy & Itch Relief
Pharmacy & Prescriptions
Anxiety & Calming Care
Urinary Tract & Kidneys
Test Kits

Trees & Scratchers

Trees & Condos
Scratchers & Scratching Posts
Wall Shelves
Window Perches

Interactive & Electronic Toys
Scratchers
Teasers & Wands
Balls & Chasers
Catnip Toys
Plush & Mice Toys

Tiny Tiger

Shop Blue Buffalo

Shop litter robot

Shop Temptations

Shop Hill's Science Diet

Shop Purina Pro Plan

Real ingredients you can see Hydration-focused cat food by Weruva. Shop now.

Feed
Treats
Blankets and Sheets
Tack
Health and Wellness
Dewormers
Vitamins and Supplements

Feed
Treats
Feeders, Waterers and Deicers
Chick Starter Feed
Nesting and Egg Supplies
Coops and Accessories
Vitamins and Healthcare

Cattle
Goat
Pig
Sheep
Llama and Alpaca
Livestock Feed
Livestock Supplements

Wild Bird & Wildlife

Wild Bird
Wild Bird Food
Wild Bird Seed
Wild Bird Suet
Wild Bird Feeders
Hummingbird Supplies
Duck and Waterfowl

Rabbit
Guinea Pig
Chinchilla
Hamster
Rat
Ferret
Bedding and Litter

Parrot
Parakeet
Cockatiel
Toys
Cages and Accessories
Food
Perches

Freshwater Fish Supplies
Saltwater Fish Supplies
Koi and Pond Supplies
Fish Food
Aquariums and Fish Tanks
Fish Tank Filters and Media
Aquarium Decorations

Reptile and Amphibian

Live Feeders
Food and Treats
Tanks and Terrariums
Heating and Lighting
Aquatic Turtle
Bearded Dragon
Snake

Shop Buckeye

Purina

Shop Cosequin

Winter care, delivered Feed, blankets, meds, supplements & more

Order your pet's prescription items.

Shop all Pharmacy

Health Services

Chat free with our vet team

CarePlus Pet Insurance & Wellness Plans

Compounded Medications

Choose from a variety of flavors, strengths, and forms for your pet or horse.

Learn about compounding

Prescription Flea & Tick
Heartworm Prevention
Pain Relief & Arthritis
Antibiotics & Antifungals
Allergy Relief
Anxiety & Calming
Ear & Skin Conditions
Eye Drops & Ointments
Urinary & Kidney
Diabetes Care & Insulin

Prescription Flea & Tick
Dewormers & Parasiticides
Eye Drops & Ointments
Antibiotics & Antifungals
Allergy Relief
Anxiety & Calming
Urinary & Kidney
Thyroid & Hormone
Pain Relief & Arthritis
Diabetes Care & Insulin

Joint and Anti-Inflammatory
Metabolic and Endocrine
Calming and Behavioral Support
Pain Medicine
Antibiotics
Allergy and Immune
Vitamins and Electrolytes

Expert Health Tips

PetMD

Connect with a Vet

Chat for free with a licensed vet tech.

CarePlus Pet Insurance & Wellness Plans

Give your pet the best possible health coverage with pet insurance and wellness plans.

Exceptional in-person routine and urgent care from our compassionate veterinary teams.

Schedule a visit

How We Give Back

We've donated more than $100M in products to rescue animal centers.

Donate to a Rescue

You can help us make an impact by donating items to your local shelter.

Find Pets to Adopt

Search thousands of pets from shelters and rescues in Chewy's network.

Join Our Network

Join our network to access benefits and resources that’ll help more pets.

Shop by Brand

Ultra Boss

Sort

Filter

Sort By

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 1 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 2 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart bottle slide 3 of 3

Ultra Boss Pour-On Insecticide Fly & Insect Control for Cattle, Sheep, Goats & Horses, 1-quart ...

Rated 5 out of 5 stars

5.0

22

$41.39 Chewy Price$41.39

$42.32 List Price$42.32

Free 1-3 day delivery on first-time orders
Free 365-day returns

Category

Farm & Livestock Supplies

Brand

Find a brand

7 Brands are shown below

10 Strawberry Street

2 Hounds Design

21st Century Essential Pet

3 Dog Pet Supply

Product Category

Health & Wellness

Price

Customer Rating

Rated 4 out of 5 stars

Rated 3 out of 5 stars

Rated 2 out of 5 stars

Rated 1 out of 5 stars