How can I determine how to tell if a kitten will be big when it grows up?

One way to determine if a kitten will be big when it grows up is to look at its parents' size. Kittens often inherit their size from their parents, so if the parents are large, the kitten is likely to be big as well. Additionally, observing the kitten's growth rate and body proportions can also give clues about its potential size as an adult. Consulting with a veterinarian can provide more accurate predictions based on the kitten's breed and individual characteristics.