Place the chicken in the slow cooker in an even layer.
Add the diced green chiles, diced onion, enchilada sauce, and red salsa over the chicken.
Stir gently to coat the chicken evenly with the sauces and season with sea salt to taste.
Cover and cook on low for 6 to 8 hours or on high for 4 to 6 hours, until the chicken is very tender.
Use tongs to transfer the chicken to a cutting board and shred with two forks to your desired texture.
Return the shredded chicken to the slow cooker and stir to soak up the cooking juices until ready to serve.
Serve the shredded chicken in tacos, enchiladas, burritos, or as desired.