This morning when I let Jake out I noticed that he had what appeared to be some little bumps on his back.It looked like little bumps making his fur stand up in those spots running up the center of his back.When I run my hand down his back you cant feel anything.Is this a problem I should be concerned with?Also I never noticed it until my wife said something but he drinks alot of water and has to pee alot.Is this something to be concerned about or is it normal?Thank You in advance for your help