I have a weakness for comics (or anything, really) that depict animals behaving like actual animals. While cats generally don't read clocks, they do often lay around all day playing with socks, sometimes becoming so engrossed in them that they forget its dinnertime. Also, while cats don't sing, if they did, they would definitely sing songs like the one in the first panel. All of which is to say that while the cat in this comic displays human capabilities that actual cats don't possess, the cartoonist is employing those capabilities to highlight actual feline characteristics.
In other words, Mooch is not just a human in a cat's body like most comic strip animals usually are. He's a cat who talks as a stylistic device that only serves to highlight his cattiness.