my 15-year-old cat will vomit every 1 to 2 weeks. Sometimes there is a hard packed bullet size wad of hair. Other times when I wipe up the vomit you can see an undercoating of fur in it. I give her Laxatone every day but this doesn’t seem to be helping. Why does she have so much far I don’t see her licking herself she sleeps most of the day. I brush her every day and do get fur from her. She’s thin, starting into early kidney disease, and I’m trying to keep weight on her so vomiting doesn’t help. My vet knows of this problem and suggested in abdominal sonogram just to be sure everything is all right. Please give me some holistic guidance on this