my bohemian swallow hen which is 2004 banded i brouth her 4 months a go from Germany she doesnt want to lay any egg and the pair mating and she sets tightly in the nest with no eggs i am so upset a bout it . the breeder told me they are breeding pair and the pigeons came from the mountains the weather in there so cold . and in Libya where i live so hot whats is happing to her ? and how often the pigeon quit laying ? does it last for to much ?any help please?