Maybe. Maybe not. I would definitely have them tested for coccidia if nothing else. And worm medicines may or may not work. A fecal test will tell you if they still have worms. There is a reason those little piggies are smaller than the others. If the problem is worms or coccidia a test will...
I don't know what to tell you. Since the piglets do not seem to be critically ill, I would go to the feed store and get something for scours in piglets. There used to be a red medicine available that you squirted down their mouths and was very effective. The fact that the piglets with the...