Congenital Myasthenic Syndrome (Golden Retriever Type) is an inherited Neuromuscular Disease affecting Golden Retrievers. Affected dogs typically present around 6-7 weeks of age with exercise-induced weakness leading to collapse. During these episodes, dogs have a short-strided gait that progressively worsens until they collapse. Weakness resolves after rest and dogs are clinically normal between episodes. Dogs develop resistance to treatments used for a similar, acquired form of the disease known as myasthenia gravis, and are often humanely euthanized due to disease severity and poor quality of life.