How much to feed a Jack Russell Terrier: rations for an active dog
An adult, neutered Jack Russell Terrier weighing 6 kg needs about 430 kcal a day with normal exercise – roughly 120 g of dry food or 430 g of wet food. A calm dog of 5 kg gets by on about 330 kcal (90 g), an active one of 7.5 kg on around 635 kcal (175 g). With a Jack Russell, a tape measure tells you which weight suits your dog: the FCI standard works on 1 kg per 5 cm of height at the withers.
Updated on
Adult weight
- Standard:
- approx. 5–6 kg
- Height:
- 25–30 cm
According to FCI standard no. 345: 1 kg per 5 cm of height at the withers – a dog 25 cm tall should weigh about 5 kg, one 30 cm tall about 6 kg.
Activity type
According to the FCI standard a lively, alert and active terrier and a good working dog – small, but rarely a couch potato.
Breed watch points
Weight by height, teeth
Calculate how much to feed your Jack Russell Terrier
Enter the weight and choose the type of food – the result updates instantly.
Leave empty = typical value of 360 kcal (usually 330–400 kcal/100 g). If the pack says MJ/kg, calculate MJ/kg × 23.9.
Result
120 g
Dry food per day
≈ 430 kcal · 2 meals of 60 g
Get it worked out for your dogRecipes with grams per ingredient in the DoggoMeal app- Range per day
- 105–130 g
- Meals
- 2 per day
- Per meal
- 60 g
- Energy
- 430 kcal (385–470)
How the figure is calculated
Resting energy requirement 70 × 6 kg^0.75 ≈ 268 kcal × factor 1.6 ≈ 430 kcal per day.
430 kcal ÷ 360 kcal per 100 g (typical dry food) × 100 ≈ 120 g.
- A starting point – check the weight every 1–2 weeks and adjust the amount in small steps. Treats count too.
Jack Russell Terrier feeding chart by weight and activity
Adult, neutered dog. Dry food with 360 kcal, wet food with 100 kcal per 100 g.
| Activity | kcalper day | Dryg per day | Wetg per day |
|---|---|---|---|
| 5 kg | |||
| Calm | 330 | 90 | 330 |
| Normal | 375 | 105 | 375 |
| Active | 470 | 130 | 470 |
| 6 kg | |||
| Calm | 375 | 105 | 375 |
| Normal | 430 | 120 | 430 |
| Active | 535 | 150 | 535 |
| 7.5 kg | |||
| Calm | 445 | 125 | 445 |
| Normal | 510 | 140 | 510 |
| Active | 635 | 175 | 635 |
How it is calculated: Calm = factor 1.4, Normal = 1.6 (neutered, 1–2 hours of walks), Active = 2.0. Entire (unneutered) dogs with normal exercise come out about 12 per cent higher (factor 1.8).
Example for 6 kg: resting energy requirement 70 × 6 kg^0.75 ≈ 268 kcal × factor 1.6 = 430 kcal a day, divided by 360 kcal per 100 g = 120 g of dry food. If your pack states a different value, enter it in the calculator above.
A tape measure, not gut feeling: the right weight
The FCI standard gives a simple rule for the Jack Russell: 1 kg per 5 cm of height at the withers. A dog measuring 25 cm should therefore weigh about 5 kg, one measuring 30 cm about 6 kg. In British veterinary practices, the average weight of adult dogs recorded there as Jack Russells was 7.9 kg – 7.3 kg for females, 8.4 kg for males. The breed was not verified against pedigree papers, and the figure does not say how many of these dogs were overweight. But it does show that many Jack Russells are well above the rule of thumb.
So measure the height at the withers and check the body shape: ribs easy to feel without pressing, waist visible from above. Under the FCI rule, a terrier 28 cm tall comes to about 5.6 kg. If it weighs 7 kg and is visibly round, base the calculation on the target weight – for weight loss that is about 255 kcal a day, roughly 70 g of dry food.
Small dogs, big dental problems
In a VetCompass analysis of 22,333 dogs in British veterinary practices, Jack Russell Terriers had 1.37 times the odds of periodontal disease compared with crossbreeds. Overall, dogs under 10 kg had more than three times the odds of dogs weighing 30 to 40 kg.
For the daily ration this means: dental care is part of everyday life, and chews count too. The WSAVA recommends keeping treats below 10 per cent of daily calories – for a 6 kg terrier that is no more than about 45 kcal. A chew with 40 kcal then uses up almost the entire allowance.
- Brush the teeth regularly and have them checked at every routine check-up.
- Deduct chews and treats from the daily ration rather than giving them on top.
- Weigh the food – with such small amounts, 10 g already makes a big difference.
Jack Russell puppies: fully grown quickly
According to the MSD Veterinary Manual, small breeds are fully grown at 8 to 12 months, and the Jack Russell is one of them. Until then, a puppy needs considerably more energy per kilo than an adult dog. Up to about three months it gets four meals a day, after that three.
According to the calculation, a puppy under four months weighing 3 kg needs about 480 kcal a day. Weigh it every one to two weeks and get it used early on to rewards coming out of the daily ration.
The puppy feeding calculator works out the exact amount by age and current weight.
Recipes with grams per ingredient – for your Jack Russell Terrier
In the DoggoMeal app you create a profile for your Jack Russell Terrier – with weight, age, activity and allergies. From this, the app calculates recipes with grams per ingredient, daily calories and portions.
- Dog profile
- Recipes with gram amounts
- Allergy warnings
- Cooking with video
Free · no subscription · every feature included
Common questions about feeding your Jack Russell Terrier
How much food does a Jack Russell Terrier need a day?
A neutered Jack Russell weighing 6 kg with normal exercise needs about 430 kcal a day – roughly 120 g of dry food with 360 kcal per 100 g or 430 g of wet food. With such small amounts it pays to weigh the food.
How much should a Jack Russell Terrier weigh?
The FCI standard gives a height at the withers of 25 to 30 cm and, as a rule of thumb, 1 kg per 5 cm – so about 5 to 6 kg. Many dogs weigh more: in British veterinary practices the average was 7.9 kg. What matters is body shape: ribs easy to feel, waist visible.
Does a very active Jack Russell need more food?
Yes. At 6 kg with plenty of exercise – around two to three hours a day or dog sports – it is about 535 kcal (150 g of dry food) instead of 430 kcal. The scales will show after two weeks whether the amount is right.
Does an older Jack Russell need less food?
Often, yes. Jack Russells live comparatively long: in a British analysis they had the highest life expectancy at birth of all breeds studied, at 12.7 years. For seniors the calculator uses a factor of 1.4 instead of 1.6 – at 6 kg that is about 375 instead of 430 kcal.
How many treats can a Jack Russell have?
The WSAVA recommends that treats make up less than 10 per cent of daily calories. For a 6 kg terrier with a daily requirement of 430 kcal, that is no more than about 45 kcal – chews included.
Sources
- FCI-Standard Nr. 345: Jack Russell Terrier – Fédération Cynologique Internationale (FCI)
- Dog breeds and conformations in the UK in 2019: VetCompass canine demography and some consequent welfare implications (O’Neill et al., 2023) – PLOS ONE
- Epidemiology of periodontal disease in dogs in the UK primary-care veterinary setting (O’Neill et al., 2021) – Journal of Small Animal Practice
- Feeding treats to your dog – World Small Animal Veterinary Association (WSAVA)
- Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom (Teng et al., 2022) – Scientific Reports
- Feeding Practices in Small Animals – MSD Veterinary Manual
- Hypoglycemia in Dogs: Symptoms, Causes, and Treatment – American Kennel Club (AKC), mit Dr. Jerry Klein, Chief Veterinarian
Calculation method
- Nutrient Requirements of Dogs and Cats (2006) – National Research Council (NRC), National Academies Press
- Global Nutrition Guidelines – World Small Animal Veterinary Association (WSAVA)
- Nutritional Guidelines for Complete and Complementary Pet Food – FEDIAF – European Pet Food Industry Federation
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