I try to have all my villagers with at least trainee doctor status - they then remember to eat and drink when they need to. It also helps to make sure that you have a chance of not having people get too much disease damage.
I can only check on my games at home and I work long hours and sometimes am away overnight. I have opened the game at times (before I started training them all at the various herbs/plants) to find that they were all reduced in health and having to spend the next 20 minutes nursing them back to health at the food bin. They all have other trades as well and in one game I had 2 who were masters of building, research and healing I also have several who are also masters in at least 2 or 3 of the trades.