[Dailydrool] Someone is throwing up

[Ann Hefner]

One of my hounds is throwing up clear gunk.  It started with
small amounts and happens a couple of times a week.  Amounts
have increased to like a cupful.  Sometimes it looks like
partially beaten egg whites, a litty foamy, but mostly clear
thick stuff like unwhipped egg whites.  I don't know whose
doing it.  I just come home and find it on the floor.
Everyone is eating and acting okay.  Any ideas anyone?