Silver Bridge Farm offers 10 ISA Brown pullets at 18 weeks — the world's most productive commercial laying hen, averaging 320 large brown eggs in year 1 with excellent feed conversion (2.0 lbs feed pe…r dozen eggs). A proprietary French hybrid (Institut de Sélection Animale) bred for maximum egg output. Sex-linked feathering (females confirmed). NPIP AI Strategy I certified hatch, Marek's Disease vaccinated, dewormed. Full NPIP permit and health paperwork. Nationwide USPS Priority shipping with live arrival guarantee. Expected first egg: within 2-3 weeks of arrival.