I love Garfield!
...Even more so since I've had Xena. Cats are all so like Garfield! :D
This is the first Garfield strip that Jim Davies made. It was published on the 19th of June 1978.
This one here was when Odie appeared for the first time - on the 9th of August 1978.
This, here, was the first time that Pooky made an appearance. The 23rd of October 1978.
And, this is today's Garfield strip: