depends on their age, babies, feed them when they wake up. anything else feeds itself but only if theres plenty of trees that are there, plus their time only goes on while you are in chao world.
A year for a chao is 2-5 hours spent in the garden. Dividing that by 365 and multiplying by 3600 gets you the length of a chao's day in seconds.So a chao's day is about 20-50 seconds.
until they are not hungry anymore
alive you idiot
just wait until the chao sits down then you will see an invisible cocoon
ok yes they can unless they are a chaos chao. they are incapeable of mating. as long as the chao is a REAL non imortal chao then they will mate (tails chao= cant mate knux chao= cant mate Amy chao=cant mate!) these are nearly inpossible if they are imortal
your chao should evolve in about level 15 but if so you should train it.into dark,neatrule,or hero but recarnate 2 for chaos chao angel chao and dark chao
Until it gets eaten...
Until it gets warm.
an hour
for a chao to turn a year old is 3 hours in the chao garden. but if your asking how many years a chao can live up to, the answer is 5 years. after that, the chao will either die. if it you mistreated it, or it will reincarnate, this happens when the time for a chao comes but if the chao loved you it will reincarnate and turn himself into an egg to be with you. a chao can become immortal after it reincarnates 2 times. but that is the maximum for the reincarnation stage for a chao. if you have a chaos chao of any kind it will not be able to breed at all.
There is more to Sonic Chao than the first evolution. First raise your chao to have high speed until it evolves into a green adult chao (Adult Speed Type) and then keep feeding it green chaos drives and no other drives. he will slowly change into a Sonic chao. (This does take a long time to do!)
it takes a little while for chao to get older but you have to care for it and after a while(depending on which character you use hero or evil)then the chao will go to the stage of chao death.