how old guinea fowl before they start laying eggs
September 19, 2008January 13, 2011 by sara. Female guinea fowl can start laying as early as 16 weeks old. If they reach 16 weeks in the Autumn and Winter months then they usually start to lay in the following Spring, so they can be about 8-10 months old when they start to lay eggs and to breed with their male partners.In the UK guinea fowl tend to lay between March and September.f they reach 16 weeks in the Autumn and Winter months then they usually start to lay in the following Spring, so they can be about 8-10 months old when they start to lay eggs and to breed with their male partners.