Ugh! Nooo! That's actually worse news than say, a velociraptor.
Foxes are so so so canny. They will WATCH you and if you step inside to get a cup of coffee BOOM there they go with a girl.
I DESPISE foxes. I would far rather have an African lion!
I rarely advocate violence. But foxes are...
Sound like fox or bobcat kills. Both bury, both start at the gut sack. I think fox because it's not in a tree. Up here, bobcats raise their prizes of the ground. Also bobcats are far less likely to approach dwelling areas.
In 7 years I've seen dozens of bobcats but lost no birds to them...