maybe you could check the information in this post for me and add your comments if needed.viewtopic.php?f=3&t=7218
Jacquie - that info is great and spot-on!
I don't really get it. You have a rooster to breed with. If it can't breed, why would you have one?
Teeni - it's just the pet rooster thing, not intended for breeding control in birds you may want to use as sires in the future. This post originated after I mentioned Suprelorin in conjunction with my children telling me that we don't eat our family and friends, so if we get any roos, they're staying attached to their heads.
Why would people do parrots?
Chicken07 - mostly to control testosterone related behavioural problems, particulary aggression, both towards people and other birds (people sometimes buy a pair thinking they're getting 2 girls, or a boy and a girl, and instead end up with 2 boys), as well as limiting that mastabatory behaviour that's so embarrassing when you have guests and your parrot decides to make love to their arm, hair, handbag, etc.
Are you sure they stop crowing once chemically treated... my cats still act like male cats even though they have been desexed.. hmmmm something to think about ..
Well, I'm not a vet and don't really understand how the rooster crows, but your comment about pre-pubescence makes me think of the castrati. They were done at around the age of 7-9, well before puberty, and they didn't have any difficulties producing volume - they just had the vocal range of a female soprano, although the quality was different.
Mike's right as far as having to implant Suprelorin before crowing becomes learned behaviour. If you think about it this way, it might be easier to understand: All chickens, both male and female are capable of producing the same sounds until puberty. At puberty testosterone pushes an "on" button in roos and the syrinx becomes more fully developed than in hens. (See Jacquie's post http://forum.backyardpoultry.com/viewtopic.php?f=3&t=7218
) Testosterone also pushes another "on" button in the brain of roos, which opens a pathway that starts that typical male pattern behaviour, such as crowing and chasing the girls. At this early stage, the pathway is very tenuous, and the "on" button needs to be pushed regularly to stimulate it, which it is by rising testosterone levels during puberty. After any behaviour is repeated often enough, the pathways in the brain become cemented firmly in place, and are repeated without the "on" button every needing to be pushed. So in a mature rooster, who has been crowing for a while, taking away his testosterone won't change the crowing because he doesn't need that "on" button pushed to perform the behaviour any more. Same thing in tomcats who spray and wander and fight and then
are desexed as opposed to kittens who are desexed before
they learn that behaviour.
Anyway, roosters are roosters, cats are cats, and humans are humans - just musing really.
You're right, people are a whole different kettle of fish! Because of our developed frontal cortex and advanced reasoning and problem solving abilities, we can teach ourselves lots of things without the need for any "on" buttons. For example, sexual behaviour in castrati - given human nature, it was probably a case of being told they were asexual that made them overtly oversexed in behavioural terms.
Wow - sorry for the long post!