creature of the night?

It's a black metal gate.  These prints are the only prints and they're about 4 feet from the ground.  There are none on the other side.

There's a cat which seems to live on the waste ground behind the house.  I told it to 'go away' when it started digging up Anniemay's newly planted rhubarb plants.  It might have come back.  Just to spite me.

Or perhaps it's a feline Banksy.  I hope not.  I couldn't cope with the tourists.  They might take the gate.  Or take offence.