I was walking my 2 pet staffies last night when my 3 year old ***** Tetley ate something, this is not unusal for her. Within a couple of minutes she started to vomit a little and foam at the mouth, she collapsed and ided on the roadside despite efforts of some poeple in the street. She had been in fine health up until this point. I had not seen what she ate and could not find any remains when I returned to the spot. I am unsure if what she ate is the cause or something else, please help?