An easy way to knock a dilo is to get on a tall rock and shoot it with a sling shot. It will take about 3 to 12 shots in the head. Make sure to keep them an neutral while near Dino's like Trikes. They are good for protecting your base and yourself while hunting or gathering supplies.
Dilos are easy to encounter and they make great bodyguards!
To tame one, knock it out(u will need to dodge venom) and then feed it about 15 meat. Taming only takes about a minute so u can have a good defence against raptors! My team has 3 dilos in it 1 parasaur and 1 pteradon and the dilos did most of the work defending against raptors!
They can’t equip saddles, but are awesome predators! My 3 Dilo’s (died after a pack of allosaurus attack) killed a lvl 3 Sarco outside my base without me knowing! And they are good guards :D just get a bunch, put them on aggressive wandering in front of somebodies base in PVP, and enjoy that newbie get wrecked