Heat olive oil in a large skillet over medium-high heat.
Season chicken breasts with salt and pepper, then sear until the internal temperature reaches 165 degrees Fahrenheit, approximately 7 minutes per side.
Remove chicken from heat and shred into bite-sized pieces using two forks.
In a small mixing bowl, whisk together the buffalo sauce and melted butter until fully emulsified.
In a large bowl, toss the shredded chicken with the buffalo sauce mixture until evenly coated.
Divide the cooked rice equally into four serving bowls.
Top each bowl with equal portions of the buffalo chicken, carrots, celery, and red onion.
Garnish with blue cheese crumbles and drizzle with ranch dressing prior to service.