This is how I operate when it comes to shipping
Below 35˚: No shipping
Between 35˚and 50˚: FedEx staffed facility
Between 51˚and 89˚: Door to door and/or FedEx staffed facility
Between 90˚and 92˚: FedEx Staffed facility
Over 92˚: No Shipping
Some people will go lower or higher than that but to me it's not worth the risk.
But it also depend on species.