Littermate syndrome is a term that describes unwanted behaviors among sibling dogs, including aggression and intense attachment. It is often used to describe behavioral issues that occur when two or more dogs from the same litter are raised together and adopted into the same home.If you are considering adopting two puppies from the same litter, it is essential to do your research and understand the risks of littermate syndrome. By taking steps to prevent it, you can help your puppies develop ...