'Red ingredients' are ingredients that we believe to be particularly low grade, highly contentious or excessively vague.

'Yellow ingredients' are ingredients that we believe to be inferior or controversial.

If no age is set, cost per day figures are based on an average adult dog.

Enter your dog's ideal current weight. For example, if your dog weighs 20 kgs but could benefit from losing a couple of kilos, enter 18kg. For more information on feeding overweight dogs, please check out our guide.

If no weight is set, cost per day figures are based on an average dog weighing 14kg.

The NFE (nitrogen-free extract) carbohydrate level does not include fibre and therefore essentially represents the level of sugars and starches in a food.

Dog foods come in all sorts of formats, each with its own pros and cons. Click here for more info on all of the options that are available.

Complete foods are formulated to provide your dog with all of the nutrients needed in a single product. Complementary foods, on the other hand, do not contain everything a dog needs and so have to be fed alongside other suitable foods. Click here for more info on all of the options that are available.

The targeted conditions filters are intended to single out products that are specifically produced to deal with a particular health problem.

For example, while “Jo Bloggs Kidney Support Dog Food” would come up in searches for foods targeting kidney care, “Joe Bloggs Dog Food (suitable for all dogs including those with kidney problems)” would not.