Walmart does sell vegan marshmallows.
The vegan marshmallows that Walmart sells are called Dandies All Natural Marshmallows and you can but the Dandies all natural vegan marshmallows in Walmart stores and even online.
Regular marshmallows contain pork which makes them not vegan.
But the Dandies Marshmallows contain no pork or other animal ingredients which makes the dandies marshmallows vegan.
A lot of people do not realize what is in regular marshmallows as well as Jello.
The pork bones are boiled and then a protein is extracted from the bones which is then turned into gelatin.
That gelatin is made into Jello and marshmallows as well as gelatin capsules for medicine.