Originally Posted by Saddlebag
Deworming after frost was done because that when the old dewormers were most effective. The new ones, the past 15 years or so get them at all stages, which is better because the buggers have quite a path of destruction. The eggs hatch in the mouth, down into the lungs, cough, swallowed then migrate thro the stomch wall taking a seperate route to the colon. When we dewormed for bots after frost the horse often had a distinctive cough, often just a single cough, and perhaps 2 or 3 a day. I used to recognize it as a Bot Cough as it's a dry cough.
Hmm. This is making me think I had better deworm again. I had never heard of the "bot cough" but one of my horses DOES have an occasional dry cough (which I thought was just dust in the hay). And I saw bot eggs on him a couple weeks ago, which I did my best to scrape off, but it is very possible to miss a few as they are so tiny.
I last dewormed w/ivermectin back in mid July. Ivermectin is pretty well the best thing to get bots, right? I hate to give the same dewormer class twice in a row, but that seems like a good idea right now doesn't it?
How long does it take for bots to go from eggs to causing the horse to cough?