In addition to the number of rewards you give, it's also important to understand what is most motivating to your pup. For my Sheltie, Nemo, food is his number one reward, followed by toys, but for my Border Collie, Scuttle, it's the opposite.
Because I consider understanding rewards so essential, I was excited to see that Dr. Erica Feuerbacher and her team at the University of Florida is doing research on this topic.
Their latest study looks at how dogs respond to different interactions with people, verbal and physical (petting). Their "test subjects" included a mix of shelter dogs and non-shelter pups, and the humans giving attention included strangers and owners. The team found that across all groups and situations, the dogs showed a preference for petting over verbal interactions by staying near the person longer during petting sessions. The pups showed significantly less proximity seeking behavior with the verbal interactions, similar to the control sessions with no interaction at all. They also found that the dogs never seemed to tired of being pet.
Erica and her team believe that petting is an important interaction between dogs and humans that may maintain inter-species social behavior. Vocal interaction, on the other hand, is something that needs to be conditioned. I definitely see this in my training. A "good boy" or "yes!," usually garners a response from my pups, but I believe it's because they know a treat usually follows the words (similar to the way you'd condition a click with a treat in clicker training).
Previous research from Erica's team showed that animals preferred food to being touched. I think most pups would agree with those findings!
What's your dog's number one reward?