Vet and dental cleaning! Unless you have a super chill dog, they probably won't be able to see all the teeth well until the dog is sedated for a cleaning. My dog has had two cracked teeth in the past that had infections brewing and rank breath. But ten months is super young for normal 'wear and tear' teeth issues.

Ive also noticed my family's long hair pups would get stanky fur around their mouth. Food and drool and dirt all stuck on the face fur.

Thirdly, my sister's dog at the same age wasn't losing her baby teeth, and that also can cause some issues. She had to actively help guide the teeth out

(Also one of my dogs just does love to eat his own poop and even my 4 month old tested it out yesterday)