Sounds like the kitty has manx syndrome. This basically means since he is tailless, the nerves in his last vertebrae are either not developed or non existent. The severity of it depends on how much of a nub he has. Commonly problems will arise around this age because as his bowels and bladder have developed he no longer has the nerve function to control them. Incontinence, bladder infections, megacolon (back up of feces in the colon b/c kitty can't completely empty himself) are things that she'll begin seeing. I hate to tell you, but if he's having this severe problems this early it isn't the best outlook. Living with all the mess is only the inconvenient part of the problem. The constant bladder infection due to kitty not being able to empty his bladder and the megacolon can turn into serious health problems.
At the clinic where I work we have 3 manx clinic cats. Nanette, a 3 year old female with about a two inch nub, Dexter, a 10 month old male with about a one inch nub, and Jack Rabbit, a 18 month old male with absolutely no nub.
Jack has manx syndrome. He was diagnosed at about 2 months. He is completely missing his last vertebrae. He leaks urine when he sleeps or when he is relaxed. He hasn't developed megacolon yet, but it's highly likely he will. He does however have frequent bladder infections since he can't empty his bladder completely. Even with expressing his bladder daily and cleaning his rear end up each day, he still gets infections about once every 2 months. He has done extremely well on Convenia. He gets a convenia injection each time he starts showing symptoms and it quickly clears up. He really had trouble around 8-12 months and would leak constantly, sometimes feces as well. But he's been doing much better these last 6 mo. Jack probably won't have a very long life. Somewhere around 3Y-6Y is where the medical issues usually get too severe. Of course he is the SWEETEST boy. He is such a ham and everybody absolutely loves him. Lots of our clients will specifically bring Jack presents, like treats, food, beds, and blankets. So many of our clients would like to adopt him, but because of his medical expenses, he will always be our baby. We know his time with us won't last long, so of course he is spoiled absolutely rotten,

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I hadn't really heard of manx syndrome until Jack, so I've learned a pretty good amount about it. If you have any questions, feel free to PM me,

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