I don't think that the alfalfa pellets could have caused this if it were only for a few days. To get excess calcium/sludge, they need to be on it weeks if not months. Not to stir a new pot, but I would wonder why she is getting continuous sludge and is unable to filter out that calcium, especially such a small amount. Can you get some bloodwork done at the vets tomorrow? I'd like to see what a panel reveals this time. I'd continue syringing water and keeping her warm/dry for now... Best of luck at the vets tomorrow. Keep us posted on how things go...