To get dog hair out of bedding first put on some rubber gloves and then remove as much of the dog hair as you can with the gloves.
Then use a dog hair removal tool you can buy online or sometimes in stores and use the dog hair removal tool to get as much of the dog hair out of the bedding as you can.
You might also need to use a lint roller which can help and then use a vacuum cleaner to suck up as much of the dog hair off the bedding as you can.
Then for the sheets and blanks that have a little bit of dog hair left run them through the washing machine and the dog hair should come off.
If not you might have to run the bedding through the washing machine again and then also use a lint roller again or the pet hair removal tool.