 Proper understanding of dog growling behaviours increases the likelihood of adoption in dogs with growling problems that are housed in shelters.Food protection in canines tends to elicit a longer growl than average, and can be directed at humans, other canines, or other animals.Some fish, such as gurnards elicit a growling noise when attempting to grab prey fish, and have been shown to have a higher success rate at obtaining prey than non-growling fish.