What cat flap? Clever tabby rings doorbell and waits to be let in house

The grey and white tabby named Winston is seen pressing his paw on the doorbell to be let in the front door at his home in Sitka, Alaska, on December 7. https://www.dailymail.co.uk/news/article-9029649/What-cat-flap-Clever-tabby-rings-doorbell-waits-let-house.html?ns_mchannel=rss&ns_campaign=1490&ito=1490