First

Find an encolsed space where its prey is to be able to feed it.first find a human take the brain out and it runs around crazy it means he wants it.

Next

Provide a soft blanket for it to sleep on and stroke it and give it pure blood for a midnight drink.

Then

Make sure you take the dragon on a walk so it gets its exercise every day so it doesn’t

 get mad  and leave you.

also 

Provide food water for it does not dehydrate and give it food so it dont stave.

After that 

Exercise your dragon daily to trot around for 20 odd minitse 

Later on 

Make time to play with your drago take him on a walk let him smith around so you could find another dragon 

finally 

If you follow these instructions you will have a healthy dragon and a happy one