So I have 9 weeks old littles (not so little). All 3 have always sneezed I just did a corid treatment and now they are outside all have always acted fine but are still sneezing. There is a clear mucus that sometimes comes out there nose. so moving on I decided on getting 3 more who always sneeze that are only 3 weeks old......should I do another corid treatment? Should I do it on the babies also or could it be an allergy thing? They were in separate boxes but I did purchase from the same store all from different bins there also though?