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I am very sorry to hear about poor wee Chastity. It does sound like those lasses must have just damaged too much before we could step in and help her. It does sound like you were providing very good supportive care (and I think a ready-made first aid kit is a very good idea) and at least she was able to spend time with a gentle soul like Misty before she passed.
Please take care & I wish you the best,