Our 7-year-old female cat has medium long-hair and from time to time has had problems with hairballs. Today I am very concerned: She has eaten very little in the last 4 days. She has had very little water to drink over the same time-period. Likewise, she has used the litter box very little, as well. I've given her some of the (Petromalt) Liquid Petroleum which has usually helped in the past, but so far, it's not helping. She looks OK, but she's hiding and sleeping more than ususal, too. I've very little $ to go to the vet today...but we all love this cat! Anything I can do, that I haven't done that will help? Thanks!