I have 5 Cayugas and 2 khaki Campbells. This summer we introduced 4 blue swedish. My girls were laying 4-6 eggs a day, but since introducing the blue swedish, it's gone down drastically! I'm lucky if I get one a day! It's been almost 8 weeks now and I'm starting to worry! Is this normal? How long should it take before they return to laying regularly?