Submitted by StubbornAries t3_11fpak1 in askscience
Do animals like dogs and cats.. Recognize their offspring or parents or siblings when it's been a long time?
Like let's say you have a pedigree dog like your run of the mill golden retriever. They all look extremely similar. Let's say a litter of puppies all go to homes and they grow up and then 4 years later run into each other like in a dog park or something. Would the dogs recognize each other as family? Like would they know that's their mom or dad or sibling? Like do the animals have some kinda scent they give off to know that this is my litter mate... Whereas they could run across another golden retriever completely unrelated and know that it's not their family? Or let's say the other dog had the same parent dogs but not of the same litter, can they recognize the connection at least that they have the same parents?
xxDankerstein t1_jala6xs wrote
Yes dogs have unique scents that they can recognize. Whether or not they would remember after years is another question. It would depend on how long they were together before splitting up, what age they were when they split up, and how long they were apart.