Great tip for admins or cheats on single player (not on mobile sorry) just type in exactly this
Cheat raincritters 50 1000 1000
The numbers at the end are important the last two stay the same unless you wnat them spawning on you and the first one is for how many you want don’t break your game with a million Ovis and dodos.... T-T
There is an option to kill off a tamed ovis. If you equip a weapon or tool and you open the radial options for an ovis, you get option "slaughter" which kills the ovis instantly. I stumbled apon this wyle drowning them for there meat.