I recommend using mutton instead of kibble, as long as you have an available supply of it.
This way you don’t need to wait and you can just feed it the first time you knock it out. Otherwise you will be stressing about the kibble. I found that a level 100 eats about 6 kibble in one day, if that helps at all.
Tame the mega during the day! It is extremly slower during the day due to wanting a rest. It is a very strong dino, it has been tested to be even stronger than the allo! Be careful if you tame it at night ;) caw