Severe winters from 1816 to 1818 led to increased numbers of avalanches, killing many of the dogs used for breeding while they were performing rescues. In an attempt to preserve the breed, the remaining St. Bernards were crossed with Newfoundlands brought from the Colony of Newfoundland in the 1850s, and so lost much of their use as rescue dogs in the snowy climate of the alps because the long fur they inherited would freeze and weigh them down.