Yes you can give them pepto bismal. I'd be most worried about her becoming dehydrated if she is vomiting regularly. Is she intact? She could be coming into her first season and I know Roxie gets an irritable stomach sometimes if she's in heat or going through a false pregnancy. Is her energy level normal or is she depressed? Could be a doggie flu type thing... our boy just went through one not too long ago but was better after about 3-4 days.