August 1st 2007The dogs, cats, birds, fish, gerbils, and hamsters you see today might look like the same animals that walked into your practice 10 years ago, but they're different. A sign of their status change might be the number of companies that cater to four-legged consumers, including Old Navy, Harley-Davidson, Origins, and Paul Mitchell, just to name a few. You can also look to what their human companions are spending on these and other products-an estimated $40.8 billion in 2007.