How long after worming can you expect it to affect them? I wormed last Monday, 6 days ago, and now one of my little guys has really bad runs. I gave him pepto and gave them all some yogurt just in case. He seems to be not be feeling well also, he's just kinda mopping around and not as playful as usual. I'm just trying to figure out if it could be from the wormer or something else? He's 4.5 months old, wormed with 1/2 inch of Safegard horse paste.