Best food for a Jack Russell
A Jack Russell does not need a food branded specifically for the breed, but its combination of small size, high energy and a well-known tendency to pile on weight if under-exercised makes a few things worth checking: a properly sized small-breed kibble, sensible portion control, and some thought given to dental care given how commonly small terriers develop tartar.
A small, energetic breed with a weight tendency
Jack Russells are famously energetic and can seem to need a large amount of food to match, but the breed is also widely known among owners and vets for gaining weight easily if that energy is not matched by proper exercise. A food formulated for small or active breeds, fed to a measured portion rather than free access, is a more reliable way to manage this than trusting appetite alone.
Small-breed recipes are typically more calorie-dense per gram than large-breed food, which suits a Jack Russell's fast metabolism when they are genuinely active, but it also means it is easy to overfeed relative to how the bag looks, since a smaller total volume still delivers plenty of calories.
Small mouths and dental health
Like many small terrier breeds, Jack Russells commonly develop dental tartar and gum problems earlier than larger dogs, partly because teeth are more crowded in a smaller jaw. A kibble sized and textured for a small mouth does some mechanical work during chewing, and a dedicated dental chew is worth building into a routine rather than adding only once a problem shows up.
Regular teeth checks, whether at home or at routine vet visits, catch developing dental problems earlier than waiting for an obvious sign like bad breath or visible tartar, both of which usually mean the problem has already been building for a while.
What we stock that fits
Our small-breed and standard dry food ranges include recipes suited to an active small dog, alongside dental chews sized appropriately for a smaller mouth rather than scaled down from a large-breed product.
A Jack Russell already at a healthy weight on their current food has no particular reason to change, and this guidance is a starting point for choosing rather than a reason to switch a dog who is doing well.
What we stock for this breed
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Long-Handled Silicone Pet Toothbrush
A food-grade silicone toothbrush with fine soft bristles on a long, paw-shaped handle that reaches back teeth comfortably. Gentle on gums and helps keep your pet's mouth fresh and clean.
£7.99
NanoSanitas Advanced No-Brush Dental Gel for Dogs & Cats
A brush-free dental gel for dogs and cats, formulated with silver nanoparticles and papaya extract to help reduce plaque and freshen breath.
£14.99
Forthglade Dental Calming Sticks
Dental chew sticks for dogs with added calming botanicals for evening routines
£2.99
Pet Dental Cleaning Wipes (50 Pack)
A tub of 50 textured finger wipes that lift plaque and freshen breath for dogs and cats without a toothbrush. Slip one over your finger and wipe teeth clean for easy daily dental care.
£9.99
Pet Oral Spray for Dogs & Cats
A 100ml pet oral spray for dogs and cats that helps promote fresh breath and cleaner teeth. Simply spray onto teeth and gums - no brushing needed for daily oral care.
£8.99
Forthglade Cold Pressed Natural Turkey
Cold-pressed turkey kibble for dogs from 2 months, soft enough to mix with water for young pups
£45.99
Forthglade Cold Pressed Grain Free Salmon
Cold-pressed grain-free dry food for dogs, built on fresh and dried salmon
From£16.99
Forthglade Cold Pressed Grain Free Duck
Cold-pressed grain-free duck food with fruit and botanicals, in two bag sizes
From£16.99
Forthglade Cold Pressed Grain Free Chicken
Cold-pressed grain-free chicken food with fruit and botanicals, in three bag sizes
From£16.99
Forthglade Complete Meal Lightly Baked Turkey
A lightly baked complete dry food, 50% turkey, for adult dogs of any breed
From£12.49
Forthglade Complete Meal Lightly Baked Chicken
A grain-free complete dry food for adult dogs, lightly baked and built on 50% chicken
From£12.49
Forthglade Cold Pressed Small Dog Turkey
Cold-pressed grain-free dry food for small dogs and puppies, built on turkey
£16.99
Common questions
- Why does my Jack Russell put on weight so easily?
- The breed is well known for gaining weight if their food intake is not matched by enough exercise, partly because they can seem constantly hungry despite being genuinely well fed. Measuring portions properly rather than feeding to appetite is the most reliable way to manage this.
- Do Jack Russells need a specific small-breed food?
- Not strictly, but a small-breed recipe is sized appropriately for a small jaw and is generally more calorie-dense to suit a fast metabolism, which can suit the breed well. It is a sensible choice rather than an absolute requirement.
- Why does my Jack Russell have bad breath?
- Small terrier breeds commonly develop dental tartar earlier than larger dogs because of more crowded teeth in a smaller jaw, and bad breath is often an early sign of that build-up. Regular dental chews and check-ups help, and persistent bad breath is worth a vet check.
- How much should I feed a Jack Russell?
- Follow the feeding guide for the specific food you use, based on your dog's actual weight, and adjust if you notice them gaining or losing condition. Weighing food rather than guessing a portion by eye is the most reliable way to avoid the weight gain the breed is prone to.
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Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.