I have a flock of five, including a Welsummer (2 1/2 years old), Rhode Island Red (2 1/2 years old), a Black Sex Link (2 years) and two Isa Browns (2 years). We haven't had a single egg from them in the last week. We are still having summer weather here, temperatures around 30 - 35 degrees Celsius. We had a slowdown in egg production earlier in the year, they seemed to be moulting and we were only getting around one egg a day. Then they picked back up to normal production for a few weeks, then abruptly stopped laying altogether. There is no evidence of feather loss now. There has been no changes to their diet, we feed them with Barastoc Darling Downs Layer, vegetable scraps from the kitchen and occasionally yoghurt. They also have access to shell grit. We haven't seen any pests around but set rat traps outside just in case. We get the occasional snake on our block but I've been checking the nesting box frequently at different times through the day and there is never any sign of eggs or any other intruders. Can anyone provide any other ideas about why they've suddenly stopped laying altogether?