The moment you decide to bring a new pet home, two things happen simultaneously: excitement takes over, and the pet supply industry sees you coming from a mile away. The shelves are full of products marketed as essential that genuinely aren’t, and genuinely essential items that are easy to overlook.
After cutting through the noise, here is the honest, practical checklist of what you actually need — organized by species and broken down into true essentials versus useful extras.
New Dog or Puppy: The Complete Checklist
True Essentials — Have These Before Day One
Collar and ID tag: A properly fitted flat collar with a metal ID tag engraved with your name and current phone number. If your dog gets lost, this is the first line of identification. Don’t rely solely on the microchip — tags are visible and immediate.
Leash: A standard 4–6 foot nylon or leather leash for daily walking. Avoid retractable leashes for training purposes — they teach dogs that pulling extends the leash and are inconsistent in tension feedback.
Harness: A well-fitting harness (front-clip for dogs prone to pulling) distributes leash pressure across the chest rather than the trachea. Particularly important for brachycephalic breeds, small dogs, and puppies.
Food and water bowls: Stainless steel or ceramic bowls are easier to keep clean than plastic, which can harbor bacteria in scratches. Elevated bowls for giant breeds to reduce the ergonomic strain of eating from floor level.
Appropriate food: Have your dog’s food ready before they arrive. If you’re planning to transition from whatever the shelter or breeder was feeding, buy both foods and plan a 7–10 day gradual transition. Abrupt food changes cause gastrointestinal upset.
Crate: A properly sized crate — large enough for the dog to stand, turn around, and lie down comfortably, but not so large that a puppy can eliminate in one corner and sleep in another. The crate is not punishment — it’s a safe space and an invaluable housetraining and management tool. Wire crates with a divider panel to resize as a puppy grows are practical and economical.
Comfortable bedding: A washable dog bed or crate mat. Puppies go through phases of destroying bedding — start with something inexpensive and durable, then invest in a quality bed once the chewing phase passes.
Enzymatic cleaner: For puppies especially, have this on hand before day one. Enzymatic cleaners (not regular household cleaners) break down the proteins in urine and feces that attract pets to re-soil the same spot. Regular cleaners mask the smell from humans but not from dogs — enzymatic cleaners actually neutralize it.
Poop bags: Stock up. You’ll use more than you think.
Basic grooming supplies: A brush appropriate for your dog’s coat type, dog nail clippers or a scratch board, and dog-safe shampoo.
Puppy-proofing supplies: Electrical cord covers or bitter spray, cabinet locks for cleaning product storage, and a plan for securing areas you don’t want the puppy to access (baby gates are invaluable).
Veterinary appointment: Schedule this within the first week. Establishing a relationship with your vet, getting baseline health records, and addressing any immediate health concerns is an essential early step.
Useful Additions
Long line (15–30 foot leash): Invaluable for recall training in open spaces before your dog’s off-leash recall is reliable.
Puzzle feeders and Kong toys: Stuffed Kongs and puzzle feeders provide crucial mental enrichment — have at least one before your dog arrives.
Snuffle mat: For scent-based enrichment that taps into the dog’s most powerful cognitive tool.
Puppy playpen: Creates a safe, contained area for puppies when direct supervision isn’t possible — more spacious than a crate for longer confinement periods.
Dog first aid kit: Gauze, bandage material, saline, digital thermometer, styptic powder for nail bleeds, and your vet’s emergency contact information.
Seat belt harness or travel crate: For safe car travel from day one.
New Cat or Kitten: The Complete Checklist
True Essentials — Have These Before Day One
Litter box: The general rule is one litter box per cat plus one extra. For a single cat, two litter boxes in different locations is ideal. Covered boxes offer privacy but can trap odors and make some cats uncomfortable — uncovered boxes are often preferred. Size matters — the box should be large enough for the cat to turn around comfortably. Many commercial boxes are too small for adult cats.
Litter: Unscented, clumping litter is the preference of most cats and the recommendation of most veterinary professionals. Avoid heavily scented litters — cats have sensitive noses and may avoid a strongly scented box, leading to elimination outside the box.
Litter scoop: Clean the litter box at least once daily — cats are fastidious and will avoid a dirty box.
Food and water bowls: Wide, shallow bowls are preferred by many cats — deep bowls cause whisker fatigue (the discomfort of whiskers touching bowl sides) which can lead cats to paw food out of the bowl or refuse to eat. Stainless steel or ceramic over plastic.
Water fountain: Cats have a natural preference for running water — many cats drink more water when provided with a recirculating fountain than from a static bowl. Given the importance of hydration for urinary and kidney health in cats, this is a genuinely worthwhile investment.
Cat carrier: Essential for veterinary visits and any travel. Introduce the carrier as a permanent piece of furniture in your home — with comfortable bedding inside and meals fed near and eventually inside it — so it’s a comfortable, familiar space rather than something that only appears before vet visits.
Scratching posts and pads: Scratching is a fundamental, non-negotiable feline behavior — it maintains claw health, marks territory through scent glands in the paws, and provides physical and psychological relief. Without appropriate scratching surfaces, cats scratch furniture. Provide both vertical posts (tall enough for full body stretch) and horizontal pads. Place them in prominent locations, particularly near sleeping areas — cats scratch as part of their waking routine.
Cat bed or hiding spot: A private, enclosed sleeping space where the cat feels secure. Covered beds, cat tunnels, and even cardboard boxes serve this purpose.
Appropriate food: Same transition principle as dogs — have the food ready, plan a gradual transition if switching from what they were eating previously.
Interactive toys: At minimum, a wand toy with feathers or other prey-like attachments. This is essential for indoor cats — interactive play that mimics hunting is a non-negotiable daily need.
Initial setup room: Particularly for adult rescue cats and kittens new to the home, prepare a single smaller room as the initial introduction space. A bathroom or spare bedroom with all their essentials allows them to decompress before facing the full home. This dramatically reduces adjustment stress.
Veterinary appointment: Within the first week. Particularly important for kittens — establishing a vaccination schedule, discussing parasite prevention, and getting baseline health information.
Useful Additions
Cat tree with elevated platforms: Cats need vertical territory. A cat tree with multiple levels, a hiding space at the base, and platforms at different heights provides territory, exercise, and a safe refuge.
Window perch: Positioned near a window with an outdoor view — ideally near a bird feeder — provides endless visual stimulation for indoor cats.
Puzzle feeders and food dispensers: Replace some bowl feeding with puzzle feeding for cognitive enrichment.
Catnip toys: For the approximately 50–70% of cats genetically sensitive to catnip, these provide enrichment at very low cost.
Nail trimming supplies: Cat-specific nail clippers and the patience to introduce nail trimming gradually as a low-stress experience.
Baby gates (if you have dogs): To create cat-only safe zones inaccessible to dogs during the initial introduction period and as permanent refuge if needed.
The “Wait Before Buying” List
These items are commonly purchased before they’re needed and are better selected based on your specific pet’s needs once you know them:
Breed-specific grooming tools: Wait until you know your dog’s adult coat before investing.
Expensive orthopedic beds: Puppies often destroy beds. Buy basics until past the chewing phase.
Elaborate multi-level cat trees: See which structures your cat actually uses before investing heavily.
Specific training tools: Wait until you know your dog’s training needs and what works for them individually.
→ Read Next: How to Keep Your Pet Mentally Stimulated — The Complete Enrichment GuideThe Bottom Line
Bringing a new pet home requires preparation — but it doesn’t require buying everything the pet industry tries to sell you. Focus on the genuine essentials, have them ready before your pet arrives, and add items based on your specific pet’s needs as you get to know them. The most important thing you’ll provide your new pet isn’t found in any store — it’s your time, patience, and consistency.
Emma Hartwell is a lifelong animal lover, certified pet nutritionist, and experienced dog trainer with over 8 years of hands-on experience working with animals of all kinds. She founded InnerzNews to give pet owners access to honest, practical, and science-backed advice — because every animal deserves the best possible care. When she’s not writing, Emma is hiking with her two rescue dogs, Milo and Biscuit, or volunteering at her local animal shelter.