Breed health surveys in the US and the UK show an average lifespan of 9.9 and 11.55 years, respectively. In their late teens, both males and females may suffer bone spurs and arthritic conditions. Autoimmune thyroiditis may be a relatively common condition for the breed, affecting 11.6% of dogs. The first cross (F1) hybrids did not resemble Dalmatians very closely. The F1s were then crossed back to purebreds. This breeding produced puppies of closer resemblance to the pure Dalmatian.