Three days ago I went to the nesting box to collect the eggs. I only have 3 chickens laying at the minute and they have started dropping off laying now that the nights are getting shorter. (I live in Scotland) They are Black Rock X and all have been laying for well over a year and all lay brown eggs, one with spots on. I also have 5 silkies who are 4 months old. In the nesting box was a brown egg and a white egg. The white egg was rather large but the shell was quite soft. The last two white eggs have had a harder shell and look perfectly normal......BUT.........who is laying this white egg? Tomorrow I am in the house all day so I shall be watching to see who is using the nest box ect but could the silkie be laying these big eggs???? I have a picture that I will post for you, it has a normal brown egg and the white eggs from the last two days, along side a 10p piece. As far as i am led to believe, chickens just don't change the colour of their eggs, do they????? Thank you in advance!!