Hello, I am sorry for the late reply. 
Is your cat's appetite normal now? Is your cat pee or feces normal?
There are three ways to care about hairball vomiting.
1. Brushes your cat well - take care of your cat's hair so that it doesn't get tangled
2. Feed the hair ball feed. Hair ball feed adds shine to cat hair so it doesn't get tangled easily.
3. give for Omega 3. Likewise, the nutrients in the fur get better, so it doesn't get tangled when grooming.
If your cat continue to vomit in the hair ball with the above method, please visit the animal hospital.

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