"Sociable animals" refers to organisms or creatures that enjoy being in the company of others of their kind and engage in social interactions or activities with them. Full definition
Dogs are sociable animals who live in family groups, so your surviving dog is likely to adapt well to a new canine if the pair are a good match. (bluecross.org.uk)
Human beings are by nature sociable animals. (firstthings.com)
Dogs are generally sociable animals and love the company of other canines. (petsmagazine.com.sg)