How Heavy should my Quails be?

2015-01-02 - Coturnix coturnix 1 Day old
I post this question, of which I receive similar questions very often, as well as my answer.
“Do you weigh your quail, and if you do, what weights do you expect them to reach on a weekly basis?
The reason I ask, is that my last lot have a really large range.
The smallest is almost 30g below the weight of the biggest. Granted these were eggs hatched from two different places, which could well explain it (bred for size vs improvement of the breed), but I’m curious what those who’ve been doing this a while expect.
They’re 2 weeks old now, and they range from 32-59g.
Funnily enough, the only two white ones are both the heaviest and lightest!”
Thank you very much for the question. Yes, being the Mad Scientist, I am a strong believer in MMM (Man Must Measure) to know where you are and where you are going to. if anywhere. I weigh all my quails at 3, 5 and 8 weeks of age and then also weigh all my mature quails at least every two months. These weights give you a lot of information to work with on individual animals, as well as your project as a whole.
The average figures I achieve at present are about the following:
5 Weeks old (all sexes – all birds) – 200 g
8 Week old Males (all birds) – 210 g
8 Weeks old Females (all birds) – 240 g
All mature Males in my Breeding Groups – 240g
All mature Females in my Breeding Groups – 280 g
There are obviously wide variations between animals as result of the limited genetic pool and small numbers of animals we have, as well as the quality and level of inbreeding in the New Zealand Coturnix coturniox we have to work with. Males are always much lighter than females at all ages.
I have some groups where all the females are all over 300 g – work in progress!!
Obviously the optimum results can only be achieved with good husbandry, feeding and housing.