When you need to show enum values in a dropdown, it’s a good idea to automatically populate the list, instead of manually setting all of the values.
To autopopulate the dropdown, set the DataSource to Enum.Values(), like this:
dropDownListPets.DataSource = Enum.GetValues(typeof(Pets));
Then to get the option the user picked, do the following:
var choice = (Pets)dropDownListPets.SelectedItem;
When I launch my form, I can see it correctly populated the dropdown from my Pets enum: