Apparently, inter-species hybridazation in animals is much more common that was thought so far.
Besides the funny implications of the story, there are more important ones. Among others, on of the creationnists' favourite argument is that mutations happen at a very slow rate, and are almost always negative. And they're right. Yet, it's the main argument so far in favour of evolution (mutation creates a vastly different individual (a new species), which then manages to strive through natural selection).
Now there is another way new species can be created.
Interestingly, a few decades ago biologists had a concept of races within species: species being the set of individual that can reproduce and create new full individual that presents the same properties (so the crossing of a horse and a donkey is not a new species because it's sterile), and races being a set of physical attributes genetically transmissible within a species (e.g. Chartreux cats' offspring is always gray and quiet; goldfish offspring is still goldfish; black African humans' offspring is always black; and so on). Later on, they started to back off off the concept of race as being too hard to define scientifically. Maybe in another few decades, even the difference between species will get blurred as it gets realised that genetic material is widely shared in many different ways.