Genuine organic dog food bears the label "from organic farming" or at least an organic seal of quality. Since there are many seals of approval, you should check each one individually.
If a dog food bears the European seal of quality (green seal with a white leaf of stars), you can be sure that 95% of the dog food comes from organic farming. The ingredients of the other 5% do not necessarily have to be of organic quality, but artificial or chemical substances are also prohibited here.
However, most organic dog food manufacturers carry other seals and certificates to commit to even more sustainability. You will often find additional seals such as Demeter, Biokreis or Ecoland. All seals of quality are strictly controlled. You can therefore be sure that your dog is getting only the best and healthiest food.
Beware of green washing! This is the name for manufacturers or brands that falsely try to generate an environmentally conscious image. You should therefore always check carefully whether it is a genuine organic seal of quality.