I've come home from work tonight and 3 bengal boys are vomiting -not huge amounts but clear frothy liquid. I've checked around the house to see what could be the cause and the only thing I can find is a basin with some water and washing up liquid (daughter must have left). Couple of questions, could this be what's causing it and how serious is this? Lubo is a bit under the weather, Lenny not too bad but poor Loki is not looking great at all.