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Early spay/neuter
https://www.facebook.com/kerrybrook.labradorretrievers/posts/3678455955513188
http://healthypets.mercola.com/sites/healthypets/archive/2013/09/30/neutering-health-risks.aspx
https://www.facebook.com/PlanetPawsMedia/photos/a.114414471966777/752848814790003/
http://healthypets.mercola.com/sites/healthypets/archive/2016/07/27/neutering-spaying-effects.aspx
https://www.facebook.com/DogsFirstIreland/photos/a.396088297121219/746188708777841/
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Why too much exercise is bad for a growing puppy
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Littermate syndrome
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Why the alpha theory doesn't work