Break in my new boots

I had a pair of very comfortable work boots that had a defect. The company replaced them, but I need to break them in. I also have a very comfortable pair of boots that I wear for work (ranch-style boots…sort of like hiking boots) and another pair that my mother in law bought me for Christmas. I haven’t broken in the new pair yet, because the old ones were so comfortable. Well now they finally are too worn, and have holes that allow things into my shoe, and I can’t wear them anymore. So that’s another pair that I need to break in, and they’re both the types of shoes I should be wearing to work…so my feet hurt.