Hi, I'm new here...but have what I think is a simple question. I have two cats, Inky & Roland, both 5 years old. Last night Inky threw up soon after eating a can food treat...this isn't common for him but not totally unusual either. Late in the night he threw up twice, once woke me up (because his poor body just heaves when he throws up and he's not very quiet about it all) and other I found this morning. Both were mostly liquid....with some spots of grass he had gotten several days ago. This morning he is very weak...he has eaten a little and drunk a little water but otherwise pretty lethargic... He seems like he's had the 24 hour bug....do cats get that kind of thing. Should I be concerned? Thanks for any reponses. Maybe it's nothing, I sure hope so.