Review on allosaurus:

Allosauruses are large carnivores found on all maps apart from scorched earth and abberation in rocky environments such as mountains. They hunt in packs and get a boost when in one. In the wild, they are completely aggressive and attack anything in their path. They fight back against any creature that attacks them until they are too low on health. Then they run away. To tame them, you knock them out and feed meat. When tamed are only really useful for eggs in pve but can be good raiders in pvp. However if you are at the level of taming one, you might as well just tame a Rex. Overall an OK tame. Probably wouldn’t recommend.

That’s another lengthy review by LunarDogo

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