On Mobile: Found lvl 290 dodo, but saved before i tamed. when re-entering game i noticed health was higher!?! So now i save-restore over and over, got over 480 health before taming, over 600 after the tame! May work with other creatures, haven't tried yet.
if u are new to ark then yes u can tame one or two but don't let ot get tooo much. i know they are cute but that's it. they are not helpful and u need to take care of them. i had so much of them and it broke my heart to kill them because i couldn't tame more dinosaurs