i have a little hc that each bloodclan cat has a very brutal/tragic backstory - i like to think that bone for example was once a very well cared for designer cat who belonged to a wealthy family but was ignored and eventually neglected in favour of a newer, fancier cat and had to learn to fend for himself on the streets. while he wasn't particularly tough or street savvy yet, he was large and very used to getting his way and he quickly established a reputation as being pushy and domineering.

brick on the other hand i'd like to think was used as bait in dog fighting rings which is how they got their signiture missing patch of fur between their shoulders, but eventually escaped (maybe with the help of bone?) and began a new life on the streets