Veterinary spending is rising along with human medical spending. Why?

"Veterinary spending is subject to few of the perversities that either left or right suppose to be the main problems afflicting health care spending.  Consumers pay full frieght most of the time.  They are price sensitive, and will let the patient die if keeping him alive costs too much.  There is no adverse selection.  There is no free riding on mandatory care.  Government regulation is minimal.  Malpractice suits are minimal, and have low payouts.  So why is vet spending rising along with human spending?"

Check out the graph at the link.