Tyrosine makes pitbulls mean? Scientific?

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heather
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Tyrosine makes pitbulls mean? Scientific?

Postby heather » Fri Sep 08, 2006 2:37 pm

Well, in an article in the press section, 'Scared of Pitbulls, You'd Better Be" the author mentions some connection between l-tyronsine and pitbull aggression.

Do any of you know what they are talking about?

I wondered if and how they measure this...is the dog already deemed aggressive when they measure it? Do all pitbulls have this? ETc... How much science is there or it this one of those, "well, tyrosine is related to aggression and the dogs we measured have alot, therefore pitbulls are mean" kind of things.

Now that I am looking for it this tyrosine thing is popping up on blogs everywhere--it could be a new myth in the making.

http://64.233.167.104/search?q=cache:0H ... =clnk&cd=4

here is an example. they keep going back to the Economist article..

scary, here is the same thing on a government webpage in Ontario:

http://64.233.167.104/search?q=cache:xo ... =clnk&cd=7

I want to read this study that this is all based on. Anyone have it?

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Postby deedeesmom » Fri Sep 08, 2006 2:45 pm

Here is a encyclopedic definition of it. It mentions its thought to be helpfull with depression, so i don't see how it could make animals mean.?

http://en.wikipedia.org/wiki/Tyrosine

Still looking tho.

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Postby onehalfwop » Fri Sep 08, 2006 2:46 pm

no idea, but there is some crap being stated "as fact" in that second link. someone needed to be there while they were speaking and slap that chocolate out of their mouths.
ridiculous! :po:

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Postby deedeesmom » Fri Sep 08, 2006 2:47 pm

Heres more

http://www.getnutri.com/L-Tyrosine.html

the first article mentions animals don't really make it, I am still looking for something more solid in terms of animals, these two are more for humans.

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heather
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Postby heather » Fri Sep 08, 2006 2:49 pm

keep looking. I have a feeling someone is going to bring this up to me or in a town meeting or something. I am sure it has been used as a reason for BSL before.

Maybe it has already been counteracted, but I want to read the rebuttal so I know what to say.

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Postby deedeesmom » Fri Sep 08, 2006 2:54 pm

http://wellvet.com/IodineTyrosine.htm

A form of this is given for thyroid problems. I doubt it makes dogs agressive. I found more refrences to it improving mood and alertness and being perscribed as an antidepressant. Still looking for anything offical about agression links.

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heather
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Postby heather » Fri Sep 08, 2006 2:55 pm

Interesting...

http://psych.ucsf.edu/K9BehavioralGenetics/
Canine Behavioral Genetics

there is a pitbull on the front page.

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Postby deedeesmom » Fri Sep 08, 2006 2:56 pm

I wish i could edit to just add to my previous post. Here is one where they experimented with it for coat color, but nothing is mentioned about the dogs getting agressive. I would think they would mention it even tho the main point was coat color.
http://www.vin.com/proceedings/Proceedi ... tegory=450

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heather
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Postby heather » Fri Sep 08, 2006 2:56 pm

http://psych.ucsf.edu/K9BehavioralGenetics/faqs.html#3

they don't support breed bans.

I am going to email them and see if they can explain the validity of this claim.

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heather
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Postby heather » Fri Sep 08, 2006 3:05 pm

I just emailed them to see if I could participate in thier study and asked them about the Economist study.

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Postby deedeesmom » Fri Sep 08, 2006 3:07 pm

http://www.vin.com/VINDBPub/SearchPB/Pr ... R00027.htm

I don't really understand if they are saying they are good or bad, but it sounds like they are talking about the equivalant of depressive or anxiety disorders in dogs, if they use it to treat it in humans, i would assume it ok for dogs too?

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heather
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Postby heather » Fri Sep 08, 2006 3:15 pm

I just hate how one study can be published showing a connection between two things (which could prove to be the opposite) and then it is used to make assumptions and to draw conclusions. Then the average person gets a hold of it and doesn't do what we are doing...they take it at face value. If we can get that article then we can find the source.

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Postby Swan » Fri Sep 08, 2006 4:49 pm

Im keeping up on this and good thing to research Heather, I read your other post last night and thanks for the links all, am bookmarking them.


I read that article before on here, and never really questioned it as there were other things that got me so mad about it. This is very good to know about, good catch and good job all.

:thumbsup:

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Postby INOCNTKITN187 » Fri Sep 08, 2006 7:56 pm

Anyone come up with any actual scientific studies? I have access to abstracts and will be searching for anything and everything to do with l-tyrosine.

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Postby chako » Fri Sep 08, 2006 8:49 pm



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