Bulldog Red Eyes

Recently, Ruki's eyes have been more and more red. In the past, her eyes would get red when she's tired--and then she get crazy and run around a lot. Just like any baby, she just needed to be controlled and forced to rest and then sleep. 

I'm wondering now if her more recent red eyes might be something else. Maybe the cold? Maybe dryness? I'm thinking maybe it's dry eye...