Original BASIC source downloaded from Vintage Basic
Conversion to Visual Basic .NET
This takes some inspiration from the C# port of Animal.
The Game class takes a console abstraction (ConsoleAdapterBase), which could also be used for different UIs, such as WinForms or a web page.
This solution also has an xUnit tests project.
Responses can be entered in any capitalization, but animals and the distinguishing question will be converted to uppercase.