Our 3 year old male cat, Kobe, was diagnosed last Thursday with liver issues. He has lost weight & throws up about once a day. The vet took away Party Mix cat treats thinking they might be the culprit & no human food. He put him on Denosyl 90 mg once a day for 30 days. He has had 3 doses of the Denosyl. He is still throwing up. How long before we see an improvement?