Pay attention to food intake. Glucose plays an important role in biology. It is the energy source of living cells and the intermediate product of metabolism, that is, the main energy-supplying substance of organisms. It is the most widely distributed and important monosaccharide in nature, and it is a polyhydroxy aldehyde. Cats are mainly not allowed to drink milk. Cats are lactose intolerant. If they can't absorb the nutrition of milk, it will cause gastrointestinal problems.