Meanwhile, season the chicken thighs with the cajun seasoning and toss together with the buffalo wing sauce, making sure each thigh is covered in cajun spice and sauce. Grill the chicken on a grill pan
for about 4 minutes per side, just until you get some grill marks. The chicken doesn't have to be cooked through completely, as it will cook some more in the soup. Remove from grill pan and shred with 2 forks.