cat attack 2

last Sabbath as I was relaxing on the couch reading i hear this yelp and remembered that the cats were outside. i dashed downstairs and opened the door. the two cats were at the door and came in while digger the dog was walking calmly and innocently with his owner.

what really happened?

the cats were waiting to come in when digger saw them and charged them. both arched and fluffed, but dennis charged back with claws and teeth, hence the yelp. by the time i got to the door, digger was acting as if nothing happened. he is only 3 or 4 times bigger then dennis.