I gave both Shadow and Kody Quest Dewormer (Moxidectin) this evening... Kody was fine, but Shadow went into shock about 15 minutes after administering it. Scared the pants off of me!
Shadow started stumbling all over the place and broke into a sweat. He began to salivate uncontrollably and his lips swelled. The vet came quickly, thank goodness!
Shadow is on the mend now, but I feel like an idiot for giving my horses this Dewormer! My vet said that he absolutely does NOT recommend this Dewormer as he has seen a lot of bad reactions with it.
Needless to say, my vet and I had a lengthy discussion about my deworming schedule. He recommends having fecal egg counts done twice per year (spring & fall). If the horses' tests show that they are low egg shedders, then deworming would not be necessary. If their tests indicate high egg counts, then he reccomends deworming with ivermectin.
Do any of you use a deworming schedule like that?