I was first fascinated by his illustration for Cat Fantastic books. This one is my favorite.
Then I found the wonderful illustrations on Celestial Seasonings teas, and, sure, Braldt has done some work for them too. Here's White Pear Tea.
And here's "Table manners"... now, he doesn't only do cats, but he does cats so very, very well... and I love cats. :-)
But, look him up.
Here's his site and here's some pictures from Les Toil's flickr.