It’s not always the same area and sometimes it seem to be more staring at the bottom of the outside chair legs too. He sometimes whines at it too.
It’s only started happening this summer but he can do it for ages.
He’s 4 years old and normal the rest of the time though he has stared to get a bit more grumpy the last year or so - barking randomly at people or dogs for no particular reason.
Any ideas?