If you’ve noticed that your kitty is significantly small, especially if you have a cat brother, or sister to compare it to, then your kitty might be the runt of that litter.
The Munchkin breed has not been fully clinically and genetically characterized, but these cats likely suffer from a genetic defect pseudoachondroplasia.
Drastic changes in cat’s weight or stunted growth in a kitten could all be signs of a serious condition or infection, and as cat parents, we have to be observant.