How Many Dogs is Enough for Canine Science?

And does it matter which dogs they are? Photo: Julia Remezova / Shutterstock By Zazie Todd, PhD This page contains affiliate links which means I may earn a commission on qualifying purchases at no cost to you. The number of dogs that take part in each research study is variable. Often, the sample size is small, because of the difficulty of recruiting dogs and their owners. And while scientists know how many are needed for statistical analysis, there are other things to take into account too. For example, breed may or may not be relevant. If only ten dogs take part in a study and they are all Australian Shepherds, the results may not be the same as if they were all Cavalier King Charles Spaniels. There are 180 breeds recognized by the American Kennel Club. Studies can’t possibly include them all, and then there are mixed breeds to consider too. Some researchers get round this by grouping dogs according to breed type (e.g. toy, working), and trying to include some