I tamed one yesterday. It took this-

A lvl 500 quetz platform

20 tribemates

500 shocking tranqs (for each tribemate)

500 element

Ten titanosaurs as bait on passive for the dodo to attack

1000 narcotics

Lead the dodo into a cliff, 10 tribemates on quetz and 10 on foot, let the dodo attack the titanosaurs,it will take about 10 hours of shooting to knock it down assuming everyone lives, once it's out have a tribemate in charge of getting more narcotics, have one in charge of feeding the narcotics and one in charge of feeding the element (torpor drains fast). Takes 5 hours to tame with 15x taming.

Hope this helps.