|Infertile "clear" egg|
The eggs that were set last week were weighed and candled today, the Bresse Gauloise eggs in the same incubator were only 67% fertile, not bad but they should have been at least 75% so I cannot sell any yet. Fertility should improve as the days lengthen and we have warmer Spring days.
Incubation takes 21 days but, by day 19 the embryo is more or less fully developed and as it emerges from the egg it needs the air held in the air sac in the blunt end of the egg. In order to have enough air the egg must lose about 13% per cent of its moisture in days 1 - 19, this is replaced by air.
|Target and actual egg weights|
In 2013 we visited the Cotswold Farm Park to have a look at their rare breeds. They had a few Ixworths, they were a bit on the small side and not really up to standard for the breed. I offered to send some fertile eggs so perhaps they will want some this year when their incubator is set .