Here's an idea. How about if Apple makes the charger cord a bit sturdier? My cat has ruined them with just one nip. I'm on my third. Finally found a fine little coil made for this purpose (imagine! There's a demand for this!) that took me forever to wrap around the cord but seems to be doing the job so far.
Sorry to imply that an Apple product's design is anything less than perfect, but there you are. There are plenty of complaints out on the web about the flimsiness of these things, including many, many instances of pets biting them.
Another answer would be to bring down the price on these suckers. Hard to believe it really costs $60 (as I recall) to make one.