How much does a baby t-rex weight?

Dosing a baby Tyrannosaurus Rex.

Firstly you would need to find a baby T-rex. Quite difficult.

As there are no experts in veterinary diseases for extinct animals you would also have a problem finding finding one to cater there.

In addition you do not state what illness the baby T-rex has so that also creates a problem.

A spoonful, maybe.