Baby poop and my breath

Sooo my 9 month old has only been having "solid food" (no purées but just snacks on what we eat or yogurt melts) she's still mostly breastfed. This started happening about a month after her starting to have other foods even though it's not much. Her poop smells HORRENDOUS. Like, if you walked into an old folks home and none of them had gotten bathed recently, bad. Do any of you have any similar experiences?? Is it something I could be eating or something she is? I revelry had been eating bread again but I am so bloated it’s ridiculous so I’m going to cut out bread again and try to eat less sugar because I’ve just been sitting at this weight for a few weeks not gaining or losing but I’m still not at my goal. Could diet changes help me and her? Her poop smells so bad and my other daughter never had anything like this. I'll also add that occasionally my breath will smell similar to her poops??? I do have some cavities that are being filled next week if that could have any relation at all?