The profile image displayed near your Feed posts differs from your dog's profile picture. This picture can be updated in the "Account and Info" section. Start by clicking on the Home button in the top right of the screen.

and then click "Account and Info."

Next, change the image in this section by clicking on the circle at the top of the page. Once you have selected your new photo, click "Update" at the bottom of the screen, and your profile picture will update.

The image that you selected will display next to all of your posts.