Black dots...hehe...if he'd had a brown marker he could made brown spots for the chocolate colored spots on the liver Dals, like in the link.
At one time the very athletic Dalmatians in the U.S. were used as deterrents underneath and/or ahead of fire carts or carriages, to ward off people from getting in the way of or messing with the horses and the equipment. Before that they ran with the horse-drawn coaches in England to create the same sense of presence, clearing the way for the horses.
Today there are competitive events with horses and carts or coaches that simulate those jobs. They are almost like marathons with the Dalmatian and the horse being judged on how well they stick together and distance. They're rare events in relation to other dog sports but they do happen. Dals are very high-energy, with a lot of stamina, and it's a way for the dog to do what he was bred for. Example:
http://www.woodwynd.com/road-trials.html
The deafness is related only to the way the pigmentation works in some breeds, including the Dalmatian.