Indoor Security Cam Recognizes Tiny Dog, but not Great Dane

I have a zone set up to keep my dogs out of the kitchen. Every time my 20-pound poodle goes in the camera yells at her like it’s supposed to.

But when my 120-pound great dane goes in, nothing happens. Any thoughts?

Before I purchased the outdoor wired cam… I stuck a pan tilt indoor cam in the window to get a feel how it might work. It picked up large deer as pets. But… the deer was a good 30 ft from the camera. Maybe cam is not far enough away for such a big animal? Just a wild guess…