Hi, Stephanie -  Most definitely Fury should start on pergolide, as your vet and Dr. Kellon have stated.  Since this is your first foray into PPID, here are a few tips:  start out at 0.25 mg daily; increase by 0.25 mg every 4 days until you are at the target dose (which is usually 1 mg to start with).  This helps prevent the "Pergolide Veil", a transient condition of lethargy, reduced appetite and spaciness.  Using APF  from Auburn Labs has also been shown to reduce the incidence of the Pergolide Veil.