In early March we had a neighbors dog come and kill several of my hens and a kind friend gave me 2 RIR hens to rebuild in flock. All 8 hens are approximately the same age, born around June 1st last year. Since I have 2 different breeds the eggs are easy to identify as to who is laying and who is not. These new girls were introduced into flock about 5 weeks ago and as of yet not started to lay again. They seem to have intregrated into flock nicely and snuggle with my 1 remaining RIR to sleep at night. They all eat the same foods. What do I need to do to induce these 2 girls to lay for me?