Build a enclosed three by three room. Drop it in. Fill your inventory with mejo berries and spilt them into stacks of 35. Once the pego steals from you it will begin to run away. Try yo stay in the opposite corner of the pego at all times other wise it will mess up the process and you will lose taming progression. Once the pego drops the bag its carrying and most of the time will hiss. slowly approach until it attacks again. Been taming tons of them trying to figure out what works. Stay away from the pego when ever it has a bag still in its hands. Otherwise it doesn't attack you again till you move far enough away...which causing you to have to repeat the what you just gained.
When you see one, put any kinds of berries in your last inventory slot and walk up to them slowly. They will take the berries and it will add to their bar. Just keep doing that over and over
-bboss505 (pls up-vote
'You have been robbed! 5 fiber'
Ah, look at it run with the little bag
'You have been robbed! 3 wood'
I dont need that anyway
'You have been robbed! 100 narcotics'
O HELL NO
'You have killed! Pegomastax lvl 10'