This all started earier in the day, as I fired some small arms, I noticed a sound of thunder then a sonic boom then the sounds of a jet flying. However you could never find the jet when you looked up. This continued all day. Then later, I was walking my dog on our 44 acres before dinner and then heard the Jet sound following a thunder sound. So, I looked up awaiting the jet or jets to fly by. Then all of the sudden, I saw what looked to be a 8-10" black bird chasing another just like it. However they were flying very fast like just under the sound barrier! The first one looked as though it was being pursued by the second. They moved around each other in a dog fight,like dog fighting jet planes! Then I noticed the second one had what looked like a "blue like" triangle over it, and when it seemed to accelerate up to catch the first one, seemed to let outr a little puff of steam or smoke! Then as they streaked out of sight making a LOUD JET NOISE OF A FIGHTER JET, I looked to see a triangle flock of these "JET BIRDS"! They flew in a triangle formation after the first 2 and went off up lone mountain towards the coast.This is real and scary! It frightened my dog and wife so much! I had to report this! PS- They seemed to look like "dead birds" shot out of a gun or? i.e. the birds never moved their wings! PSS- We were affraid to report this! We feel the government or UFO (ET's) may not want us to have seen this!