[stomachmonkey]

ACL tears in dogs is almost always a result of the joint angle.

A vet can measure and tell if a particular dog is prone to the injury.

Generally, if they tear one it's only a matter of time before they tear the other so it's wise to get pet insurance even if it's after the first event. Our Mastiff tore her 2nd one pretty much a year to the day after the 1st. But we had taken out insurance and it was covered.

The type of fix is size dependent, pocket dogs can sometimes get by with no fix at all while TPLO is the only option for large working breeds.