My Russel has split her tail a few times whacking it off Walls, kennel etc blood everywhere, might be a reason to get it done. If mine does it again it'll be coming off.
My old 95lb American Bulldog would chew them up at an given chance and I'd spend all night picking needles out her face and roof of her mouth!! She once shook one about before I could get to her and when I did I received a face full of guts, yummy lol
Get it back on raw, pm me and I'll give you some suppliers that deliver!! Also maybe some electrolytes may come in handy to cool down the dogs core temp and replace any lost salts and sugars.