Babies Only eat SEEDS (any type, get yourself an iguanadon) untill 10% on their own, you can force them to eat meat if you stay by then and push the button... Once 10% (Juvenile) they will eat MEAT on their own from the trough.
Cosmo
The Cosmo is a small jump spider creature in ARK: Survival Ascended: Aberration. This skittish carnivorous spider from the Neogene period uses its glowing webbing to fend off predators and aids players by recycling webbing for ammunition, allowing them to slow enemies, retrieve items, and swing through the environment.
How ARK players tame and knock out the Cosmo: what to feed it, what to knock it out with, and how to keep it safe.