Poor little Claire, hope she is feeling better now. What about cat grass, doesn't she like it ? I think I have seen it in some of your pics. All my cats did and do it, they eat grass and a bit later they throw up grass and hairs and that's it. No hairball medicine needed at all.
More hairball woes for Claire this morning...accompanied with much up chucking before I went to work, and more during the day when I was at work, but it looks like she was able to yak up the trouble maker, and ate her dinner right up...just waiting to see what happens next if anything.