The complication of cock-bird call suppression has already been covered and ...
there can be variations of the cock Lavender's call due to age and other birds.
Sound clip below is of a bird, now called Alan, originally sold to me as a Lavender hen called Elaine.
As the calls evolved/ varied, a name-change was required to Alan.
Several recordings have been made of Elaine/ Alan which show how over a short time his calls have varied.
First half of sound clip is Alan in early May being very circumspect. This is followed by him in June in full cock-call voice.
(DNA test confirmed - Alan)
(Click on player below in turn to hear the calls - the player works
in most browsers)
(If the player doesn't work, please try clicking on the text link to the left of the player)
sound scopes below show Alan
with some initially confusing cock call variation