Have a cat whose Vidalta has just been increased from 15mg to 20 mg as it is not quite doing the job. I am sure we were told to give 10 mg twice a day - but not given timings as to when to give. I am just reading around the topic and most material I have read says that it is very important to give the vidalta only ONCE DAILY AT THE SAME TIME. Does anyone know what regime is the correct one - we have two 10 mg tablets to give. Thank you.