Direct answer: follow the life-stage guidance on the chosen food and ask your vet to confirm timing for your kitten. Do not move a large-breed kitten early simply because they already look big.
Use age and development, not appearance alone
Kitten food supports growth, while adult food is formulated for maintenance. Maine Coons and other large cats may mature slowly in appearance, but that does not create a universal breed-specific transition date.
Change food gradually
Introduce the new food in increasing proportions while reducing the old one, unless a vet tells you otherwise. A measured transition makes it easier to see whether appetite or stools change.
Pause and ask when needed
Seek veterinary advice if the kitten is underweight, overweight, unwell, eating a prescription diet or persistently refusing food. Avoid withholding food to force acceptance.
Where furniture helps: Kitty Buffet may support this part of the routine. Check the live product page for current specifications and suitability; furniture does not replace veterinary or behaviour advice.
