Too early for teething??

Hi everyone
Well, Koda teethed around 4mths but we barely noticed as he never chewed anything, it didnt really bother him.

Mya on the other hand is chewing her kong, anything constantly, shes got lots of toys etc so shes always got something, i just thought it was just habit, as shes only 2mths, so too early for teething right?? i know most dogs teethe around 3-5mths ish....and i hadn't thought anymore about it but i've noticed when shes sleeping shes dribbling which i've never experienced but i know that can indicate teething?

she is well in herself apart from that, do you think she could possibly be teething early?