[Lil Bastrd]

It depends where the smell is coming from. As it has come up all the sudden I would probably say it is coming from the stomach. If they changed what the dog ate this could do it. Charcoal cookies help eliminate some of the odour. It could have been always smelly though and as you were away from it a bit you are noticing it more now. I would recommend a bone, or stuff a kong with some cookies. How old is the dog ? With toothbrushing start by getting the dog use to you opening their mouth. then use your finger to start. When they are comfortable with that introduce the toothbrush.