I have several circumstances like that now. I have an 04 female that likes to go off feed for weeks at a time for no particular reason, and is just now reaching 1200g's. On that same note, I have 2 early 05's, 1 is at 1000g, 1 is at 780g. Then I have 1.1 05 het alb...female is at 980g, male is at 570g. I even have an 03 female I bought about a year ago at 1300g, who's at 2050 now...with laying a clutch, going off feed 2 times for several weeks. So growth just differs.