A domestic kitten lives 1 year of adulthood equivalent to 18 years of human adulthood. Some stray cats grow slowly because they have no stable food source since childhood and have long-term nutritional imbalances. They will only become adults in about 2 years. Therefore, cats at home should try their best to provide cat food with reliable brands, balanced nutrition and reliable quality, and appropriate calcium supplementation at the age of 6 to 8 months will help cats become physically mature at 1 year old.

The cat grows in stages, mainly divided into young Cat and adult cat stage, kitten stage and milk cake stage, soaring stage, puberty. The adult cat stages include adulthood, lactation, and old age. Different periods correspond to different human ages. Cats grow mainly in the first year, and then grow slower.