Have you ever considered taking two puppies at once - from the same litter?
This article written by Jeff Stallings, CPDT_KA and published in BARK discusses some of the challenges that one might encounter with siblings. Puppies that is.
"Littermate syndrome" refers to displays of behaviour that develop due to the bonding between siblings that can manifest in fearfulness and intense separation anxiety. The idea is that the deep bond developed by siblings during key development periods can impede their individual ability to absorb information.
Dr. Ian Dunbar is referenced in the article, along with behaviour specialist Nicole Wilde and Dr. Melissa Bain, a veterinary behaviourist. The gist of it is that puppies must master the art of being alone, and that can be difficult with two siblings. Many shelters and rescues discourage the adoption of siblings; however, sibling pairing can be successfully done with appropriate owner involvement and awareness.
This is not to say that having siblings is a bad thing. Certainly multi-dog household have great benefits, particularly when age, temperament, and timing are carefully considered. And indeed littermates can benefit from an older dog already in the household.
What are your thoughts and experiences?