In this article
- First, find out what the food is for
- Separate ingredients from analytical constituents
- A pack can omit an energy value
- Use the lookup or photograph the right panels
- Understand what the energy estimate can do
- Check the portion as carefully as the energy
- Save a useful record, then check it when things change
The front of a food pack tells a story. The useful numbers are usually elsewhere: beside the ingredients, analytical constituents and feeding instructions. Start with the pack you are actually using, rather than a similar-looking recipe found online.
A label scan can help copy information into a food record. Reading it well means checking the food's purpose, matching each number to its heading and keeping a printed value separate from an estimate. The aim is an accurate record of the bowl, not a score for the brand.
First, find out what the food is for
UK Pet Food explains that complete food supplies the nutrients needed for daily life when fed as directed. Complementary food needs other food to provide nutritional balance; examples include mixers and treats1. Check that description before trying to make sense of the energy figure.
Also read the intended species and life stage. The industry body's current labelling guide lists the product description and feeding instructions among the information the pack must provide2. A familiar bag colour is not enough to establish that you have the recipe you meant.
Write down the full product name as you check it. Include a distinction such as adult or puppy when it is part of the product. If you have two foods open at once, keep their labels and notes separate instead of moving between photographs and relying on memory.
Separate ingredients from analytical constituents
Composition is the ingredient list, normally in descending order by weight, using individual or permitted category names. Analytical constituents describe nutrient levels, including protein, fat, fibre and ash. UK Pet Food explains that ash is mineral content, not an ingredient added as ash2.
The older factsheet explains that a declaration such as 4% chicken gives a guaranteed minimum of that named ingredient; other animal ingredients can also be present1. It does not mean a food contains only that amount of animal material in total.
| Heading | What to look for |
|---|---|
| Composition | Ingredient names or categories |
| Analytical constituents | Nutrient percentages |
| Additives | Declared added substances |
| Feeding instructions | How the food is intended to be used |
Do not move a number from one heading into another because the word beside it looks familiar. An amount in an additives declaration is not automatically the same thing as an analytical percentage. If you cannot identify the field, leave the question open and use the manufacturer's contact details.
A pack can omit an energy value
The published feed rules list analytical declarations for dog food and treat an energy declaration as optional. Their moisture rules also explain why a pack need not always print a moisture percentage3. A missing energy figure does not give you permission to invent one from the front-of-pack description.
Find out whether the figure you can see is kcal per 100 g, kcal per kilogram or an amount for a pouch or other portion. Keep the unit beside the number while you work. Moving the number without its unit can change the meaning of the entry completely.
A hypothetical unit check
- Pack4,000 kcal per kilogram
- Same concentration400 kcal per 100 grams
- Example portion40 grams contains 160 kcal
- MeaningArithmetic only, not a portion recommendation
Those are made-up figures to show the conversion. Dividing a per-kilogram value by ten gives the value per 100 grams; a 40-gram portion is then four-tenths of that amount. Do not apply the example numbers to a different pack or use them to decide your dog's daily food allowance.
Use the lookup or photograph the right panels
In Dogoos, barcode lookup checks its catalogue and then Open Pet Food Facts if needed. Match the returned recipe to your pack. A label scan can use up to three photos of the same food; one scan a day is free. You check and correct the result before saving4.
Put the package where you can read it yourself. Make the relevant panel large enough to inspect and keep folds or glare from hiding a digit. If you need several pictures, keep them with the same product rather than combining a front panel from one recipe with the analysis from another.
Before saving a scanned food
- Is this the exact recipe and intended life stage?
- Have I matched each value to the correct heading?
- Can I verify every decimal point and unit?
- Is the energy printed, estimated or still unknown?
- What information do I need to ask the manufacturer for?
Read the result beside the package once, field by field. It is easier to settle an uncertain number while the pack is on the table than after it has been thrown away. Keep a question as a question when you cannot resolve it from what is printed.
Understand what the energy estimate can do
Where protein, fat, fibre, moisture and ash are all available, Dogoos can offer a modified-Atwater energy estimate, marked as estimated. It does not fill a missing constituent with a typical value. You can keep the food without energy; unknown values leave the day's calorie total incomplete4.
Jewell and Jackson's retrospective study analysed dog and cat feeding data gathered over 24 years. Across dry and canned foods of both species, the average absolute difference between modified-Atwater predictions and measured energy was 6.7%. Dry dog-food energy tended to be underestimated in their data5.
That is not a 6.7% accuracy claim for an app scan or every food. The dataset was more digestible than many market foods, and generalisation was limited. Hill's funded the work; one author was employed there and the other had been. The study did not test Dogoos5.
Use the estimated label to preserve the distinction. A result calculated from constituents and a value printed by the manufacturer can both look like a number in a box. They have different origins, and your record should continue to tell you which you used.
Check the portion as carefully as the energy
UK Pet Food's factsheet says feeding guides are designed for the average pet, with size, age and activity affecting needs. It recommends monitoring weight and body condition and seeking further advice when needed1. A calorie concentration alone cannot settle your individual dog's feeding plan.
Keep a distinction between energy in the food and the amount actually served. If you are recording two foods in one bowl, identify each part and its own portion before adding anything together. Check whether the pack's instructions concern a whole day or an individual meal.
If an instruction is unclear, ask the manufacturer or your veterinary practice with the exact product details available. Do not interpret the worked example above as a way to replace a puppy feeding plan, a weight-management plan or instructions for a veterinary diet.
Save a useful record, then check it when things change
Dogoos does not rate or rank foods or recommend therapeutic diets; it records what is known about the food4. The useful final check is whether the entry matches the product you have and clearly shows where uncertainty remains.
Keep the pack available when you next buy the food. Compare the recipe, label and instructions with your record, especially when something looks different. A saved entry makes repetition convenient; it does not remove the reason to check what you are serving now.
When you finish, you should be able to explain the entry in plain language: this food, this portion, this energy source and this unanswered question. That is a better foundation for logging meals and discussing feeding than an impressive total built from a guessed value.
Sources and further reading5 sources
The small numbers in the article link to the source behind each fact. Sources open on their own websites.