I made a batch of mmf for a cake I was making the next morning . It turned out great , I started coloring it red for my dog cake in my photos and it was doing great but The last bit of red color I put into it did something to the mmf ( I think ) my mmf wasnt plyable any longer it started breaking and lost its shine . I finally added another batch to it just so I could work with it . What happened ??? I was starting to panic ! Could I have kneaded it to long

Too much red will do that to it. It's not anything that you did wrong, it just happens. Using super red so you don't have to add as much helps. Adding the color to the melted marshmallows before you put the sugar in will help a lot too.

If you can find the strawberry MM's, then you start with a pink color, and don't need as much red coloring.

And it tastes GREAT!

That does make sense Texas_rose , I guess it would be like adding more water to my recipe :/

OMG , What a great idea with the pink mm's ......Thank you my cc friends