Your dog will probably be just fine. Believe me, they probably eat worse when you’re not looking
However, your dog should not have access to any place the tortoise is pooping, assuming the poop was in the tortoise’s enclosure. Dogs and tortoises definitely don’t mix.
I let my tort free roam for about 10 minutes and they dogs were put away. Guess he pooped in the corner and I didn’t notice until my dog was eating it! Thank you so much!