I lived near my sister in law in Utah for 7 years. She owned a male cat. She fed him daily in the morning and headed to work. However she needed to drop off her daughter at child care first and pick her up coming home. Her cat was easily home 9-10 hrs Mon-Fri depending on her other quick stops.
I never once heard her mentioning that cat possibly vomiting if she didn’t hurry. But then again he was an adult cat with no health problems.
If you friend seems uncomfortable in your presence, looking constantly at their IPhone or laptop messages, coming late to see you or frequently canceling at the last minute with “emergency” excuses that if asked about later they seem vague or don’t mention voluntarily something may be amiss?