We had a fox take one of laying hens we only had three so now down to just two. Since then the other two are laying their eggs on the coop floor. I had no issue before with them use the nesting boxes. I have three new pullets that will join them in a few months. I don't want the new ones to get into the habit of laying on the floor. We also used to free range our hens but now they are confined to their run. Could all of these changes be effecting their behavior. If so is there anything I can do to fix this? I tried putting a fake egg in the nesting boxes since the hen that fox got always laid first but it didn't work.