That is the sports cartoon, with a total of 45 episodes, which was jointly produced by Derek Lamb and Janet Perlman at 1985. There are four kinds of animals in the animation: cats, hippos, dogs and pigs (although I seem to have only seen cats and hippos ...). They also play curling, shot put, darts, football, rugby and table tennis.
According to reports, cats and hippos are the most common, sometimes they are single, sometimes they are cats versus hippos (I remember curling and football come out together), pigs and dogs rarely come out, pigs occasionally come out to compete with hippos with cats, and dogs just come out as referees or something.
I still remember that every time the hippo threw darts, the cat would beat the ground and make trouble. Finally, the hippo looked at the red heart of the dart target as if he saw the red nose of a cat. It was so funny ~ ~ I learned about curling through that animation when I was a child and liked it very much.
Specific introduction in Wikipedia:
http://en.wikipedia.org/wiki/Sports_Cartoons
But I can't open the video. I wonder if there are any good people who provide video links. I really want to see it ... I will keep looking. )