I would not treat them. Fish are fasted for several days before shipping.
After they have been in the tank a day or two, feed what they were getting at the LFS. And wait a week or so before you decide they are not eating...it can take several weeks for fish to become comfortable in a new tank and stop hiding, start eating and have normal feces.
After they have been in the tank a day or two, feed what they were getting at the LFS. And wait a week or so before you decide they are not eating...it can take several weeks for fish to become comfortable in a new tank and stop hiding, start eating and have normal feces.