First, you need to gather a variety of different foods such as : berry’s, strawberries, oranges and lots more. If you don’t get these then you will probably get stood on. Next, make sure you have a cave near your location because to be honest and troll won’t be able to fit in a house once it grows. However, looking after a troll will be hard, but if you like challenges this pet is good for you.
After that, make sure you have a location in the woods because if a police man/women might shoot it down. Then you will make sure that you have the right amount of space to let the troll run wild and have fun, DONT keep it locked in then cave for the whole of its life.
Finally, this is the most important one of them all! Make sure you actually want a pet troll otherwise you may get one and then regret it and it won’t go back to we’re you got it from.