Riverside County and San Bernardino County to the north form this metro area. Like many such metro areas in the Southwest, it extends far into uninhabited desert areas, in this case east through the Mojave Desert to the Nevada/Arizona border. Larger than nine U.S. states, it is often referred to as the Inland Empire.
I agree with tchrist that the word doctor in doctor appointment is a noun (attributive noun I believe), although the definition of an attributive noun is a noun used as an adjective, so maybe it's just semantics at some point.
Vet Appointment. Here's the rule of thumb for taking your meowing friend to the vet for a funky black fungus-like nastiness on or near her nails: If something seems out of the ordinary, make an appointment. Her paws, nail beds and nails should never appear reddened or swollen or be plagued with blisters and scales.