Really need some advice guys! We have a 5 yr old rescue greyhound. We've had her for about 6 months and have never had any problems. This morning my partner went to stroke her and for no reason at all she went for him biting him several times in the head and face. He is ok thank god but has a nasty cut on his head and bruising. She's calm now but we've got no idea why she would do this???? She has never ever been aggressive before. I just don't know what to do could this just be a one off or is she likely to attack again now she's done it once? How would u guys deal with this???