My horse is perfectly healthy but has upped its Zinc, C and D3 intake recently. He just got some dewormer in. Is the recommendation to go ahead and take some or wait until symptoms develop? I have found a lot of dosing recommendations but it seems to be split on when to actually start deworming. I guess my fear is if I deworm my horse before he actually has symptoms, it might make it less effective if/when he develops symptoms? Thoughts?