04/19/2025
âLittermate syndromeâ gets tossed around like itâs a scientific fact. But spoiler: it isnât đš
What is real? The very predictable challenges that come from raising two adolescent brains at the same time. In practice, it can feel like three times the work.
Calling this a âsyndromeâ mislabels a training issue as a medical one, which gets in the way of actually solving it. In reality, itâs just predictable fallout from raising two young dogs without intentional, separate training.
Sibling pups (or even just two dogs that spend a lot of time together) bond hard. If you donât proactively practice solo time, they can melt down the second theyâre apart, and tune you out when theyâre together.
Try teaching âsitâ while your students are busy wrestling. You probably wonât get very far.
Separate, short sessions are mandatory if you want either pup to learn anything.
As their hormones kick in, best buddies can even morph into âfrenemiesâ đŹ But proactive behavior work will help you communicate clearly, notice potential conflicts early, and keep minor spats from becoming major fights.
To be fair: there are upsides. Builtâin playmate, consistent enrichment, and the sheer joy of watching a friendship bloom between two animal companions that you love.
If you find yourself in this situation, trick is stacking the deck so the benefits outweigh the headaches.
Understand that 2x the dogs = 2x the work. You canât expect one of your puppies to âhelpâ take the load off of raising the other.
My advice: in the beginning, walk, train, and cuddle each dog separately every day. Your bond with each dog is the antidote to codependency.
Supervise play, manage resources, and consistently step in before roughhousing escalates so your puppies learn how to take cues from you even while theyâre feeling rambunctious.
This part cannot be overstated: If you want to succeed, you MUST commit to training each dog one-on-one.
Rest one pup with an amazing chew while you work the other. Then switch. Everyone learns to chill alone. Everyone gets focused time where they can actually learn without constantly being distracted by their sibling. Both dogs will learn quickly and feel satisfied - and you will, too.
Bottom line: adopting littermates isnât a moral failing, but it is a SIGNIFICANTLY bigger project, and you have to treat it accordingly in order to succeed. If you have the bandwidth and a solid plan, you can absolutely raise *two* rockâstar dogs.
If youâre on the fence, start with one pup. Youâll be glad you did. Take the time to nail their training, and then add a second dog once the first is a confident, wellâadjusted sidekick.
How many dogs do you have? How far apart in age are they? đ€
Sources below! Join the Dog Training Revolution at zakgeorge.com đ
âThereâs No Scientific Reason to Believe Littermate Syndrome Existsâ
by Kayla Fratt, IAABC Foundation Journal
https://journal.iaabcfoundation.org/littermate-syndrome/
This article argues that âlittermate syndromeâ lacks scientific backing and that the behavioral issues attributed to it are more likely due to inadequate training and socialization practices.
âLittermate SyndromeâPenn State Extension
https://extension.psu.edu/littermate-syndrome
This one acknowledges the absence of scientific literature on littermate syndrome but notes that anecdotal evidence from professionals suggests behavioral challenges can arise when raising sibling puppies together.
âUnderstanding Littermate Syndrome In Puppy PairsâTexas A&M University College of Veterinary Medicine & Biomedical Sciences
https://today.tamu.edu/2023/09/28/understanding-littermate-syndrome-in-puppy-pairs/
This article discusses potential behavioral issues in puppies raised together, such as separation anxiety and fearfulness, and emphasizes the importance of individual socialization and training.
âWhat is âLittermate Syndromeâ?âVeterinary Partner - VIN
https://veterinarypartner.vin.com/default.aspx?Id=11564754&catId=102897&pid=19239
This source explains that while âlittermate syndromeâ isnât a recognized medical condition, the term describes behavioral challenges that can occur when two puppies are raised together without proper individual attention.
âLittermate Syndrome in Dogs: Fact or Fiction?âMad Paws Blog
https://www.madpaws.com.au/blog/littermate-syndrome/
This blog post asserts that thereâs no scientific evidence supporting littermate syndrome and suggests that observed behavioral issues are more likely due to the challenges of raising two puppies simultaneously, and provides some tips for avoiding issues.
âLittermate SyndromeâWikipedia
https://en.wikipedia.org/wiki/Littermate_syndrome
The Wikipedia entry gives an overview of littermate syndrome, notes the lack of scientific consensus and highlights that the behaviors associated with the term may result from environmental and training factors rather than sibling status.
What is your experience? Tell me in the comments!