You are kidding, right?
As a read-a-nit-of-biology Creationist Christian, I could've told you that this is a possible, even probably result.
There's nothing in El Reg's article that comes close to the sort of genetic changes needed to go from one life form (eg cat) to another (eg dog).
I'd be willing to bet that the two forms of virii could even interbreed - except that IIRC virii cannot "breed" per se, and need a host to allow that.
It's a big hurdle, and still to be passed. This is an outcome expected within normal and previous observed levels of variation within a normal species. Along the same lines as when one of my cats had kittens, where they had different colour patterns despite same parents, or where one kitten could not handle certain foods while another from the same litter loved them.