Eileen - 249708 Port Perry, ON 5/15/2013 4:05:48 AM My daughters 2 labs get this every spring when they go to the cottage the first time for the season. Both dogs swim allot. After about a day or 2 their tails are fine again. One of these labs is a healthy 17 year old but for almost 17 years he get this just for a couple of days after the first visit for the season to the cottage. Neither of her dogs appear to have much or any pain with this.