We had a problem...now there's another one.

We have a problem with our cat puking. Before it seemed like it was whole food and she was just eating it to fast, now it is liquidly. She was on Eukanuba (sp) and puked, and we switched her to purina one, she seemed to be doing good with it the first 3-4 weeks now she's puking again. what could be causing this? and why is it now in liquid form?

 

could be food allergies....you might have to try different foods to see which she can tolerate.
I'd also get a complete blood panel done (if you haven't recently) to make sure everything is okay.

 

Sometimes this could also indicate that she's having difficulty puking up a hairball.

 

I would have her checked by a vet.