43+ Overactive Bladder Syndrome In Dogs PNG . If there is loss of bladder control then it is known as urge incontinence. An overactive bladder is a condition resulting from the sudden, involuntary contraction of the muscle in the wall of the bladder.an overactive bladder causes it is sometimes referred to as small bladder syndrome. Full Article Current And Future Pharmacotherapy For Treating Overactive Bladder from www.tandfonline.com Most veterinarians will diagnose horner's syndrome based on clinical symptoms. This is sometimes called an unstable or irritable bladder or detrusor overactivity. Also called hyperadrenocorticism, cushing's syndrome occurs in dogs when the adrenal glands, which are responsible for producing cortisol, become overactive. Overactive bladder is a syndrome, or a set of symptoms, that is believed to be due to sudden contractions of the muscles in the wall o...