This fool won't eat unless another dog is around. I'm thinking resource guarding to the extreme? Additional comments.

Jelly like substance in dogs poop. Had recently changed dog food about a week ago.

She has been running and playing normally. About 1 day ago I would hear her stomach rumbling a lot which has happened in the past. She wasn’t eating her new food much but Josh figured it was upset stomach. Today she pooped this out and was worried. I gave her the old food back and she ate it all up right away.

This is on my dog’s upper chest on her right side. Is it an extra nipple or a tick? lol