I saw dental energy at the Beijing Pet Show, but only dental energy was 1. Doesn't that mean that teeth can be suitable for different dogs?

You certainly didn't consult carefully. I learned that the product line of Tooth Energy has been adjusted, and there are two series of products, one is professional chewing series and the other is chewing snack series. The original tooth energy 1, No.2 and No.3 are now collectively called tooth energy 1, and then the pet products of different ages are subdivided under tooth energy 1, so tooth energy is still very suitable for dogs of different ages.