If you have been doctoring a goat for the runs and you have used the same medicine for 3 days in a row with no improvement, then you better do something different.  Get a stool sample to the vet and see if you are dealing with worms, coccidi, some sort of bacteria/virusor a nutritional problem.  Don’t keep doing the same thing if it is not working. The extra time spent on checking a sample and the extra costs will be cheaper in the long run when considering the benefits of getting the animal straightened up.