She looks so lovely and sweet. You probably already know this but you can wipe her eyes with a warm damp cloth to help with the tearing/stains. Tommy's eyes run a little bit too at times though they are better since their diet change.

I really wonder if she has some shar-pei in her. She has some similar features and her hair seems too long/bushy to me to be only boxer and pit, both breeds have very short hair but Roxy's hair reminds me of my Tasha's, a bit shaggier. It's possible Roxy could have more than just the two breeds in her. With shelter mutts we never can really know 100%, not that it matters .