In dogs with this condition, the opening of the sheath is extremely small, preventing the penis from extending and in some cases interfering with the flow of urine. Neonatal phimosis is a birth defect that occurs most often in German Shepherd Dogs and Golden Retrievers. Several pups in the litter may be affected. Adult phimosis can be caused by a sheath infection or a congenital defect.
Treatment: Some cases of phimosis resolve with treatment of the associated sheath infection. Most will require surgery to enlarge the opening. Neonatal phimosis causing urinary tract obstruction requires immediate relief.