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Playlist: How to teach your puppy or dog the basics in order: https://www.youtube.com/playlist?list=PLMssKIjsDxXmMGypWsr8u-yGOUSoPoozb
Neutering: https://en.wikipedia.org/wiki/Neutering
Overpopulation in Domestic Pets: https://en.wikipedia.org/wiki/Overpopulation_in_domestic_pets
Pet Ownership Statistics: http://www.humanesociety.org/issues/pet_overpopulation/facts/pet_ownership_statistics.html
Animal Shelter Euthanasia: https://www.americanhumane.org/fact-sheet/animal-shelter-euthanasia-2/
Shelter Intake and Surrender Pet Statistics: https://www.aspca.org/animal-homelessness/shelter-intake-and-surrender/pet-statistics
Effect of Gonadectomy on Subsequent Development of Age-Related Cognitive Impairment in Dogs: https://avmajournals.avma.org/doi/abs/10.2460/javma.2001.219.51
Determining the Optimal Age for Gonadectomy of Dogs and Cats: https://avmajournals.avma.org/doi/pdf/10.2460/javma.231.11.1665
Early Spay-Neuter Considerations for the Canine Athlete: http://www.caninesports.com/uploads/1/5/3/1/15319800/spay_neuter_considerations_2013.pdf
The Plot Thickens: Spay Neuter Effects & the Health of Our Dogs: http://www.patriciamcconnell.com/theotherendoftheleash/the-plot-thickens-spay-neuter-effects-the-health-of-our-dogs
Are There Behavior Changes When Dogs Are Spayed or Neutered? https://www.psychologytoday.com/blog/canine-corner/201702/are-there-behavior-changes-when-dogs-are-spayed-or-neutered
Does Spaying or Neutering Your Pet Really Improve Behavior?: https://www.huffingtonpost.com/sophia-yin/does-spaying-or-neutering_b_272030.html
Effects of Castration on Problem Behaviors in Male Dogs with Reference to Age and Duration of Behavior: https://www.ncbi.nlm.nih.gov/pubmed/9227747
Effects of Ovariohysterectomy on Reactivity in German Shepherd Dogs: https://www.ncbi.nlm.nih.gov/pubmed/16772140
Why Spay and Neuter? http://www.humanesociety.org/issues/pet_overpopulation/facts/why_spay_neuter.html
Why the Latest Studies Haven’t Changed Spay and Neuter Recommendations: https://www.drandyroark.com/latest-studies-havent-changed-spayneuter-recommendations/
The Truth About Spaying and Neutering by Dr. Karen Becker: https://www.youtube.com/watch?v=enPCZA1WFKY
Dangers of Early Pet Spaying or Neutering: https://healthypets.mercola.com/sites/healthypets/archive/2011/02/17/dangers-of-early-pet-spaying-or-neutering.aspx
Myths and Facts About Spaying and Neutering: http://www.humanesociety.org/issues/pet_overpopulation/facts/spay_neuter_myths_facts.html?credit=web_id83581228