How is Lucas today, Jen?

I took CJ in last night and the vet put him on pred. also. He said that if he reacts to this - meaning things start firming up - that means he's allergic to something either in the food or the environment and the next step is to do allergy testing to see just what it is he is allergic to.

It does seem odd that your Lucas would all of a sudden develop an allergy like this so maybe he has different issues, but maybe knowing this will help you and your vet in Lucas' diagnosis also.