My cat suffers from both sinus issues and irritable bowl disorder. Is there a safe and effective holistic supplement that can be used for anti-inflammatory? We are interested in something that would not stress the liver. Curcumin or pycnogenol is an example that works in humans, but would it be safe and effective in cats? Also, what dose? She is currently on Dexamethosone 0.125 mg twice a day.