Dalmatian dog

Few breeds have a running résumé like the Dalmatian's: it was used as a carriage dog, trotting alongside horse-drawn coaches and fire engines, and its muscular frame still carries excellent stamina. There is one breed-specific catch that runners must plan for. Dalmatians cannot break down uric acid normally, so it builds up and can form bladder and kidney stones. Plenty of water on and after every run, regular toilet stops and a low-purine diet are part of owning one. Deafness also occurs, so ask about hearing tests.