Up this if you think it helps! Carchar will be buggy when trapped and could constantly attack giving you no chance at gaining trust. Seems to prefer small dinos and doesn't try eating flyers. If it misses the first chomp on the corpse then it will no longer gain trust on the corpse you are feeding it. You must be carrying the corpse while it is feeding on it. I found it easier to gain trust by building a walkway so it has an easier time chomping the corpse. After gaining full trust I found it easier to gain taming on extinction with the amount of dinos near the spawn. I highly recommend using an elixir on high level carchars so that you can tame it without having to gain it's trust again.

Finally some last pointers to help out...

I found using a baby rex (boss rex) was instant trust when it chomped on the corpse. Carchars will likely sniff the corpse you bring it and not chomp, meaning you have to render in the area by leaving or you may or.may not have to kill it if it stops trying to chomp the corpse. I forgot to mention that I don't know if just any baby rex will do so be wary of that. The carchars will most definitely kick you off after it reaches 100 stacks, so take it back to your trap before 98 stacks. That should be all you need to know! Hopefully this helps!

More Carcharodontosaurus Taming & KO Tips