Spondylosis affects a number of GSPs, and it can be a devastating condition that can render a lively and energetic dog into a very sad soul indeed. It is understood to sometimes have familial links but can also be caused by excessive stress or injury. There are number of courses of action that can be taken to alleviate the pain associated with this condition, including spinal surgery and hydrotherapy. There is a simple straight forward article giving you a basic understanding of what might be involved in living with an affected dog on this linked site:
Limber tail syndrome
Before the recent legislation a GSP owners would have been unlikely to have to deal with the problem of "Dead tail", but sadly with the increased numbers of entire tailed GSPs,it is fast becoming recognised in this breed too. The article below gives you an understanding of this condition and how to manage it.