I called CRO this evening to modify my reservation dates and explained that I wanted reservations for loop 300 as a preferred pet loop. The CRO was helpful but explained that loop 300 is not a pet loop. I replied that I had friends presently on loop 300 with pets. He asked me to hold, returned and said that currently there is a "test" on using 300 as a pet loop but that CRO could not authorize it as a pet loop. He encouraged me to keep checking back. This seems very complicated.