Ok so I went to barter and searched for Ulfr dye, and used up my apples on what I thought was that dye, and me being my impulsive self, immediately applied it to my wolf without double checking or thinking. I accidentally bought a Sandbar die, so now I'm a bit bummed because I wanted an Ulfr dye. I honestly don't know what to do.

Good news the dye comes out with next month's event so you can get it then from the event shop

Oh, I didn't know that, thanks for telling me :D