You might look inside the beak of Michonne for any yellow patches of gunk that should not be there. I don't know if it is related to the hole under the beak, but wet pox lesions can cause airway and feeding problems if present. Look at any others with severe pox. For lice you need to repeat the dusting in 10 days, for mites, 7 days. Lice are fast moving, mites slow. Here are pictures of lice/mite eggs to make sure of what you are dealing with: http://anrcatalog.ucdavis.edu/pdf/8162.pdf