✔ 最佳答案
Since your cat is already 11 yrs old, I would suggest your cat has a detail body check up. It's quite expensive. You may ask the vet if your cat needs to do any "hyperthyorid test", ultrasound, or even barium test". You may ask the vet if your cat has "Inflammatory bowel disease". Any foreign object inside her body? Those could also make your cat vomit. If your cat keeps vomitting, your cat might need to put on the drip.
I have a good vet which I can introduce to you. But his clinic is located at Kowlooon City. It's a bit far from your apartment.
Muffin