CPL is exactly what Sam has. It is a constant battle, the prescription remedy was very expensive. The equine vet said that his proticol "cures" about 85%, of course Sam was in the 15%. It gets worse every year. The vets prescription called for:
Day one Gentocin IV
Frontline spray on his legs-
liquid Ivermectin orally
Day two Gentocin IV
Day three Gentocin IV
Days 4-10 Sulfa tablets
days 10 - 40 Prednisilone tapering off for about the next month
Along with Fast Track probiotic the entire 10 days.
This prescription lasted about a year, then we did it all over again.