@Geoff_Kraabel Here's an example of that logic:
{formmenu: default=Visit Reason; Wellness; Health Certificate; Recheck; Acute Diarrhea; Chronic Diarrhea; Sick; Tele-Health; name=Main Visit Reason; cols=30}
{if: `main visit reason` = "Wellness" or `main visit reason` = "Health Certificate" or `main visit reason` = "Tele-Health" or `main visit reason` = "Recheck"}
{options=["General Diet", "Weight Loss", "Bland", "IBD", "Low Fat", "Allergy", "Atopy", "Consider Diet Trial", "Joint", "Kidney", "Urinary", "Cardiac","Hepatic", "Diabetic", "Vegetarian", "Calming"]}
{elseif: `main visit reason` = "Acute Diarrhea" or `main visit reason` = "Chronic Diarrhea"}
{options=["Bland", "Low Fat", "IBD", "IBD (Puppy)", "General Diet", "name=Special Diet 2"]}
{elseif: `main visit reason` = "Sick"}
{options=["Bland", "IBD", "Low Fat", "Not Eating", "Current Diet", "General Diet"]}
{else}{options=""}{endif: trim=yes}
{if: options<>""}
{formmenu: values={=options}; formatter=(value)-> value if includes(option, value) else options[1]; name=Special Diet}
{endif}
{if: `Special Diet` <> "" and not includes(options, `Special Diet`)}{`Special Diet`=options[1]}{endif}