baby mobs and villagers nbt age is set to 0

when i was trying to make a auto chicken farm but i notised the baby chickens wernt growing up so i decided to check then nbt data and i relized that the age was set to 0 and i believe that affects all other animals and villagers | how to reproduce: spawn in any way the game lets you | how to fix: put the passive mobs age back to its origanl number and make grow into adult again when the ticks reach 0