It is also hard to trace what happened to the bloodlines of destriers when this type seems to disappear from record during the 17th century. Many modern draft breeds claim some link to the medieval "great horse," with some historians considering breeds such as the Percheron, Belgian and Suffolk Punch likely descendants of the destrier. However, other historians discount this theory, since the historical record suggests the medieval warhorse was quite a different 'type' to the modern draught horse. Such a theory would suggest the war horses were crossed once again with "cold blooded" work horses, since war horses, and the destrier in particular, were renowned for their hot-blooded nature.