Most likely dog, I THINK I see some claw marks on the edges. Cats don't usually leave claw marks on their tracks.
Every big-footed dog around is suspect, including your own. Even a Basset or Daschund could have big feet and dig like a maniac. First thing you need is hardware cloth for an apron around the fence. How many miles? Maybe hog fencing buried all round? Either that or electric. I got a pretty good electric fence setup at
TSC last year, all the parts came to about $150.
I keep having giggling fits, sorry. I just have this weird vision of you or Ken in flannel jammies, sleeping in a sleeping bag with a shotgun out there.
No room to talk here though - just last year, a portly 50+ year old woman out in the middle of the night, wearing a translucent nightie with untied tennies, a flash in one hand, gun bigger than her head in another. Growling at unknown preds.
Yup, that would be me. Many, many nights.
I have GOT to type faster. I was looking in my tracking book while Cindi typed.