House report: Hillary Clinton was âjust wrongâ on Benghazi. John Hayward Follow @@Doc_0 | Wednesday Apr 24, 2013 4:37 PM.
Kittens typically reach a length and weight close to their full-grown size by 9 to 12 months of age. After the 1-year mark, most cats continue to grow at a much slower rate until at least 18 months of age. Large breeds, such as Maine coon cats, typically take even longer to grow to their full size. These cats may not be fully grown until they reach 2 to 4 years of age.
Cancel. Kittens stop growing and enter adulthood between 8 and 12 months of age, but they continue to gain weight after their bones stop growing. Switch a kitten to a lower fat adult cat food when they reach adulthood with help from a veterinarian in this free video on pet care.