Genetics Question

[Kelly Glee]

I have what I assume to be a dove and a dove spot breeding pair.  They have had two litters, eight babies in each litter.  Out of sixteen babies I have gotten 15 lilacs and doves. The sixteenth baby appears to be a pink eyed white.  If you look very, very closely and use your imagination, you can see some darker hairs scattered in among the white.  I am assuming her genetics are   aa chch E G pp   However, statistically wouldn't more than one baby out of sixteen be white--shouldn't around 25% be white?  Is it possible she is something else--maybe a light lilac with an extensive spotting gene or something that makes her appear white.  Could her parents really be lilacs and not doves?    Let me know what you think.  Thanks a bunch!   Kelly