First off,you have to find a wolf.They aren't usually hard to find,but one place you can surely find them is in a pin near a village.
After you spot a wolf,you tame them with a bone.Hearts rise from the wolf and a collar appears,transforming it into a dog.
This dog will protect you from anything you hit,except for creepers.
Remember that you can always have more than one pet. (Such as dogs,cats,etc.)
You can get them to sit them down,as well as cats,by pushing L2 on your controller.This will keep them put and out of your way for as long as you want.
That's about it and hope you enjoyed these tips.
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Minecraft:Tips & Tricks
AventuraHere's some tips and tricks to help you on Minecraft.