Milk
It would be very unlikely that you would be able to feed a baby camel in Costa Rica. These animals are not naturally occurring in Central America and would be more likely to be found in Africa or the Middle East.
small mice
You feed it whatever you would feed an adult penguin, but you first must mush it up because baby penguins cannot eat whole foods.
I am not certain how old is a 'baby' field mouse. They like greens and can forage. A nursling would likely not survive without its mother. You could feed a nursling with a dropper and some baby food, perhaps.
I'm sure you can feed your reborn baby real milk, but i would prefer a fake milk bottle.
you could feed it peroxide ? i dont know what would happen though !
You can feed your ferret Gerbers second stage chicken baby food, it's even recommended for sick ferrets or ferrets with stomach problems (ulcers) as it's easier on their stomachs. But I wouldn't recommend feeding them any kind of baby food with vegetables, fruits or sugars in them, only the chicken.
the advantages of breast feeding are that if you brest feed your baby it is most likely your baby will be stronger than if you use normal milk.
The same way you would with most babies.
Medical causes Or Baby may require specialized formula
deep
They like bread or boiled lettuce/spinach. I would not feed them baby food.