"Unnamed baby deer" is not an official name yet. It may have been referenced in the storyline as such, but has not been officially named. Alternatively, it may be a name popular among fans, but has no official basis.
In "Pups Save an Adventure", Alex accidentally triggers his camera's flash, scaring the little fawn, which caused her to run. It resulted in the scattering of embers from the camp fire across the area.