My wife called me and said somone had rang the doorbell but when she got there nobody was there. She was worried someone was doing the ring the bell and then go around to the back door. I told her to look at the back yard because nobody would make it to the back door. So she asked what about if they kick the front door in. I told her if they do just open the back door

But when they got to the gate and saw the dogs they decided to move on.
If somone got past your dogs I would say it was somone you know. Get hidden cameras. Nobody can get in my yard without me getting them on video at least twice.