I personally would stick a muzzle on the dogs for their first couple of meeting, they are not expected to know it's not a rat or something they are used to hunting as they haven't been brought up with them.
Things can go wrong very quickly, our dogs were used to our ferret (pets) my cousin had come to visit with his dog who had seen the ferret several times before but was always very intrigued by it.
The hutch was in the house and the lid of the hutch was accidentally left up , the dog leapt over the dog gate which was a fair bit higher than baby gates.
Ferret didn't stand a chance as it