I started with 3 batches of 1day old chicks from 25/07/2018 bought 10 chicks Hi-Line Silver Hybrids lost one after 7 days all are Hens and good layers. 2nd batch was Boschvelders (special SA breed I believe) 10 bought 1/8/2018, got 6 cocks and 4 hens have given away 5 cocks 3rd batch got 23 Hi-line Brown chicks lost 14 within 3 weeks 1 has remained midget and barely grown. the others are All good pullets started laying at 18 weeks. They free range in my garden 3 to 4 times a week. their run area is an enclosed old compost heap.