Join Date: Oct 2007
Location: Alberta, Canada
• Horses: 0
Actually one of the more recent studies has shown that horses should only be dewormed three times a year, with different dewormers of course.
To the OP - if you are deworming twice a month, you are doing it way too often. Have you heard of the thing called "building resistance"? That's what your horse is going to start doing - it may not be evident for years, or even a decade, but it will become apparent.
The lovely images above provided by CVLC Photography cvlphotography.com