It is not the mark of quality ingredients. No propylene glycol, which is the thing used to keep foods moist. The dog food industry is a well-known dumping ground for waste products from the human food industry. Meat ingredients should be whole also. Meat-based treats are best for dogs.
Most commercial treats are grain-based.
But, treats with meat in them more closely match a dog's natural diet. Top-quality, whole ingredients are best. These would include oatmeal, rice, vegetables, fruits, nuts, and eggs. Organic ingredients are the best. That's because pesticides are in our foods, even if they are not listed as an ingredient.