The Pet Door

Pet Door

An Opening Used To Let Pets Enter And Leave

Cat Workers

• Egypt
• Wildcats as workers
• 7500 BC

Cat Pens

• Egypt
• Were Used To Keep Cats In AND Not Escape
• 6000 BC

Cat Hole

• England
• Writer Geoffrey Chaucer described a simple cat hole
• Described in his Canterbury Tales
• 14th Century

Pet Door

• Isaac Newton
• Made a Large Hole For A Cat
• Made Small Holes For The Kittens
• 19th Century

Modern "Doggy Door"

• 20th Century
• Many People Wanted To Have Pets
• The Modern Doggy Door Was Born
• Started In The United States 
• Grew To The UK And Other Euro Countries

Electronic Doggy Door

• Selective Access To Certain Pets
• IR, RFID Chips, Etc. Can Be Used
• Invented In America
• 21st Century

Bibliography

• http://news.nationalgeographic.com/news/2004/04/0408_040408_oldestpetcat.ht...
• http://books.google.co.uk/books?id=PXYUAAAAYAAJ&pg=PA298#v=onepage&q&f=fals...
• Wikipedia.org (Pictures)
• Oxford Dictionary