Advanced Science Diet Chicken Medium Breed Dry Dog Food 12kg bag

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Harringtons medium breed advanced science diet is a complete dry dog food that has been specially formulated to fuel the energy needs of medium breed dogs during the prime of their life.

  • Helps support digestion, stool quality and boosts immunity through our proprietary mix of pre-and pro-biotics, vitamins and minerals
  • Maintains skin and coat condition through a balanced ratio of omega 6 and 3 oils
  • Helps support mobility and joint condition with added glucosamine and chondroitin
More Info

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We believe every pet deserves a healthy, nutritious diet that meets their needs. That’s why we partnered with Peter Wright from The Yorkshire Vet to help us create Harringtons Advanced Science Diet.

“I've been involved with Harringtons since they were founded in 2008, and now I feel extremely proud to have worked with them on these advanced recipes with specific health benefits covering digestion, immunity and skin & coat conditions, that are affordable to all.” - Peter Wright MRCVS

Vet-endorsed pet nutrition

What's in our food?


Helps to boost immunity and support digestion and stool quality through our proprietary mix of natural prebiotics and probiotics, vitamins and minerals

Healthy food that tastes great too

With freshly prepared chicken, cooked in a delicious chicken gravy

Helps support mobility and joint condition

With added glucosamine and chondroitin

Vet-endorsed Nutrition

Naturally enhanced for health & wellbeing

Maintains skin and coat condition

Through a balanced ratio of omega 6 and 3 oils


We're proud to be the UK's first carbon-negative pet food company. We generate our own electricity, and source locally.

Advanced Science Diet Medium Breed Dry Dog Food 12kg

Tailored to meet the specific needs of medium breed dogs

Watch Peter Wright from the Yorkshire Vet explain the benefits of Advanced Science Dog Food:

Ingredient Benefits

  • Vitaguard™

    To help support healthy digestion, stool quality and to help boost immunity.

  • Chicken

    A great source of natural protein for energy, growth and repair.

  • Glucosamine & Chondroitin Blend

    To help support joint structure & movement.

  • Vitamin E

    To help support a healthy immune system.

  • Yucca

    To help reduce unpleasant odours from flatulence.

  • Omega 6 & 3

    To support a healthy immune system, aid cognitive development and maintain your dog’s glossy coat.

Full Ingredients

Chicken (30% including 4% Freshly Prepared Chicken and 26% Dried Chicken)
Rice (14%)
Chicken Fat
Beet Pulp
Salmon Oil
Hydrolysed Poultry Protein
Yeasts (0.1%)
Dried Chicory (1000mg/kg)
MOS (1000mg/kg)
Glucosamine (500mg/kg)
Yucca Extract (150mg/kg)
Chondroitin Sulphate (100mg/kg)
Pomegranate Extract (100mg/kg)
Additives (Per Kg)
Vitamin A 16,000iu
Vitamin D3 1600iu
Taurine 750mg/kg
Vitamin E 150mg
Zinc (Zinc Sulphate Monohydrate) 75 mg
Iron (Iron Sulphate Monohydrate) 50 mg
Manganese (Manganous Oxide) 40 mg
Copper (Copper (II) Sulphate Pentahydrate) 5 mg
Iodine (Calcium Iodate Anhydrous) 1 mg
Selenium (Sodium Selenite) 0.1 mg
Antioxidants (tocopherol rich extracts – natural antioxidant)
Gut flora stabilizer Bacillis subtilis C-3120 10cfu/kg
Analytical Constituents
Protein 25%
Fat Content 14.5%
Crude Fibre 3%
Crude Ash 5.5%
Omega 6 2.5%
Omega 3 1.5%

Feeding Guide


180g-360g Per day

Harringtons advanced science diet is a complete food for all dogs aged 8 weeks onwards. The recommended daily servings shown in the chart are a guide only. How much you feed depends on age, breed and level of activity and you should use your own judgement to determine the correct amount of food needed for your dog. For active dogs add 10% more food. Young and growing dogs require feeding little and often and to appetite. Always make sure that your dog has access to fresh water at all times. When changing dog foods, we recommend that you do so gradually. Store in a cool, dry place and fold down the top of the bag after opening.

  • Made in
    the UK
  • Natural
  • Carbon Negative
  • Recyclable


A guide on our delivery charges can be found below. A full confirmation of delivery charges and an estimated delivery date will be provided at the checkout before payment is taken.


Orders are dispatched Monday - Friday. If your order is placed on a public holiday or weekend, it will be dispatched the following working day. Orders placed by 12pm are normally dispatched same-day, orders placed after 12pm will be dispatched the following weekday.

Standard Delivery Service

Includes delivery to:

  • All mainland postcodes in England & Wales
  • Most mainland postcodes in Scotland, excluding Scottish highlands and some harder to reach areas

Once dispatched, your order will usually arrive within 1-3 days (excluding public holidays).

Delivery Charge - Subscription Orders

Order Total Delivery Charge
Spend £30 or more FREE delivery
Spend under £30 £4.99 delivery charge

Delivery Charge - One-time Orders

Order Total Delivery Charge
Spend £40 or more FREE delivery
Spend under £40 £4.99 delivery charge


Other Delivery Areas

Please see our delivery page for further details.

Help & Advice


My pet is over 7 years old, is this product still suitable?

Yes - although our packaging states 1-7 years, this product is still suitable for older dogs

What is the difference between small dog food and another adult food except for the size of the kibbles?

Small dogs can benefit from extra protein in their diet, which the small breed dog food gives them.

Read More

What are the phosphorous levels of your dry foods?

We do not measure phosphorous levels in our foods. If your dog requires a low/high phosphorous
level on advice from your vet, you will need a specialist food. Your vet should be able to advise you.

When do you change a puppy from puppy food to adult food?

The point at when you change over from puppy to adult food is a personal choice. General advice is to begin to make the change once your puppy is around three-quarters expected adult size and
many people choose to do so at some point between 9 and 18 months. 

The main difference between our puppy and adult varieties is that puppy contains higher levels of protein to assist with the high growth rate associated with that life stage. Our adult varieties are suitable to feed from the age of 8 weeks, although when feeding an adult variety to a growing puppy we do advise that you feed according to your puppy's appetite. This ensures they grow at the correct rate and consume enough nutrients to support this.

Do you make a food for a diabetic dog?

We do not add sugar to our Harringtons dog food but there are natural sugars present in the
ingredients. Usually complex carbohydrates such as those found in whole grain are best as these are broken down in the digestive system slowly and so avoid peaks and troughs in the sugar levels in the body. In most of our foods we do use whole grain wheat and/or maize which take longer to digest. We therefore do not recommend grain free food for diabetic dogs.

It is often a good idea to feed your dog small portions of food more often as this will also help to keep sugar levels stable.