Kittens keep barking even when they are full

There are several possibilities for kittens to keep barking when they are full: 1) they miss their mother cat and want her to come close to them for love, so they use their barking to attract her to come over; 2) they are uncomfortable, or they are uncomfortable due to indigestion or other diseases, so they keep barking; 3) they may miss their owner and use their barking to attract her to come over and pet them.