My Buff Orpington stopped laying eggs for 4 months during winter and molting season. In spring she started up again laying almost every day. Now for the past 3 weeks she has laid a total of 2 eggs and many fart eggs( very tiny with no yolk). I find them in the coop , in the nesting box and out in the yard where they free range. Nothing has changed and my other chicken is still laying as usual. Any ideas? Thanks!