Are you using the group selection option in the Create tab of the morphing tool menu? It is unchecked by default. Checking it, will allow you to select just the head group, so that the morph brush will not affect the eyes. Same with teeth. With group unchecked, the morph brush will affect anything that it touches. 

Another option would be to hide one eye in the properties tab. Then apply the mirror morph option on the X axis incrementally. Morph a bit, apply mirror, morph a bit more, apply mirror again, etc. For example, if morphing the right side of the face, then you would apply the mirror on the -X to +X option. 

Also, turn down the magnitude of your morph brush if you haven't yet. It is around 0.5 by default, which is way too high for most facial morphing. a setting of 0.025 gives much better control. 

And, you should be working on the dev mesh, not the production mesh. That way you don't have to deal with stripping out all the other morphs and other bits in the .CR2 when you go to package it all up for redistribution.

A side note: You might want to consider bringing her eyes closer together, as the majority of real people's eyes are one eye width apart, from lacrimal to lacrimal  (the inner corners of the eyelids closest to the nose). As it is, Roxie's eyes are too far apart, giving her an odd look by default, but they aren't quite as far apart as your morph shows here. You have them about 1 and a half eye widths apart. Just a suggestion.