https://en.wikipedia.org/wiki/Garfield#History https://en.wikipedia.org/wiki/Garfield#History is probably a good start. Wikipedia is a bit coy and trying to be

https://en.wikipedia.org/wiki/Garfield#History https://en.wikipedia.org/wiki/Garfield#History is probably a good start. Wikipedia is a bit coy and trying to be neutral. But even just from there you can see that the author decided to make strips about cats, because Snoopy had already cornered the dog market.