In several neurological diseases, axons lose their insulating myelin sheath. what is the consequence of this loss

   In unmyelinated axons, the action potential (nerve impulse) travels continuously along the axons and thus, the conduction of nerve impulse is slower. The loss of myelin sheath is called demyelination and is the hallmark of some neurodegenerative autoimmune diseases like multiple sclerosis or acute disseminated encephalomyelitis. Demyelination interrupts signals between the brain and other parts of the body and it includes symptoms like loss of vision/hearing, blurriness in the central visual field, double vision, weakness..

Used to water and cool climates, probably not thick coated or fluffy. they most likely have thin coats and have to survive to find food. sorry if this wasn't the answer you were looking for..: )