Our Oreo had a damaged tail when we found her at under 6 weeks. About half way along. She has no concerns with mobility or continence, and is the most agile cat I’ve ever had in terms of high rise confidence. She bounces through the gum tree like a monkey. She has no sensation in the top half of her tail, and sometimes it is nearly straight up, other times we can see the bend. She uses it prehensile-y and wraps it around things like cats with normal tails do too. Young Max may be just fine, and even if he’s not quite, we know he’ll be loved just the same.