Say a goblin dog is hostile and attacking a druid. Druid casts calm animal on the dog and it fails its save. What attitude does the dog have while under the effect of calm animals? Can the druid attempt to use wild empathy to improve the attitude of the dog?
It doesn't change the dogs attitude. It just makes it stay where it is and not attack. The druid could use wild empathy on the goblin dog at a -4 penalty due to the 2 Int. I would expect if the druid had to use calm animals the animal was hostile to start, and that's where it would start.