You can raise babies using their algae.

Tame four or more high level Archelons, cryo them for a few days then release them and level them up in food only. Put them in water and harvest the Algae until you have 40+ stacks in a fridge. You should be harvesting almost two stacks per hour (@x1) . Breed them for eggs and incubate the eggs using a gigantoraptor. Hatch the eggs and immediately drop the baby then cryo it and release underwater. Manually feed them the Algae unit the hit juvenile. Then feed them Mejoberries from troughs.

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