I currently have my horse agisted at my work, and we have just had all the school horses wormed. My horse is in an unserviced paddock with six other horses. Basically, I have to do everything myself, which I thought included worming my own horse. Anyway, turns out this isn't the case, and they did it without telling me so she has been re wormed by me the very next day. I have read that colic is a possible side effect of overdosing on worming paste, is this common? And is there anything else I should be looking out for?