Place 2 pounds boneless, skinless chicken breasts in large saucepan and cover with water. Place saucepan on stovetop over high heat and bring water to rolling boil.
Once water begins to boil, immediately reduce heat under saucepan to medium and simmer chicken 10 to 12 minutes or until chicken reaches internal temperature of 160° Fahrenheit.
When target internal temperature is reached, transfer chicken to large bowl. Set chicken aside to rest until cooled.
Once chicken has cooled, shred chicken into small pieces using 2 forks or other shredding method of choice. Set shredded chicken aside.
Place medium saucepan on stovetop over medium heat. Add 1 tablespoon avocado oil to saucepan and continue heating pan until oil is hot and shimmery.
When oil is hot, transfer shredded chicken to saucepan. Add ½ teaspoon cumin, 1 teaspoon chili powder, 1 teaspoon salt, and ¾ cup salsa to saucepan and stir until all ingredients are incorporated.
Increase heat under saucepan to high and bring mixture to boil, then immediately reduce heat to low. Simmer mixture, stirring occasionally, until all ingredients are warmed through, approximately 3 to 5 minutes.