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Anna Bracken, a veterinary medicine student at Colorado State University, looks at the teeth of a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Kendrah Jensen, a Veterinary Medicine student at Colorado State University College, looks at the teeth of a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Colorado State University College of Veterinary Medicine students perform dental floats at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Carissa Brandt, a Colorado State University College of Veterinary Medicine student, holds onto a horse as an other students works on the teeth of a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they performed dental floats on nearly two dozen horses.

Colorado State University College of Veterinary Medicine student uses a DeWalt drill with a grinder to perform dental floats on horses at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass.

Anna Bracken, a Colorado State University College of Veterinary Medicine student, uses a DeWalt drill with a grinder to perform a dental float on a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they performed dental floats on nearly two dozen horses.

Anna Bracken, a Colorado State University College of Veterinary Medicine student, reaches in to check the teeth after performing a dental float on a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they performed dental floats on nearly two dozen horses.

Dr. Luke Bass, left, of Colorado State University College of Veterinary Medicine, holds the mouth of a horse while showing students how to perform dental floats at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Anna Bracken, left, and Carissa Brandt, both Colorado State University College of Veterinary Medicine students, perform a dental float on a horse at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they perform dental floats on nearly two dozen horses.

Dr. Luke Bass, left, of Colorado State University College of Veterinary Medicine, rinses the mouth of a horse before showing students how to perform dental floats at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Kendrah Jensen, a veterinary medicine students at Colorado State University, draws a sedative to give a horse before performing a dental floats at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they perform dental floats on nearly two dozen horses.

Colorado State University College of Veterinary Medicine students, and staff, setup to perform dental floats at Dumb Friends League Harmony Equine Center on May 16, 2017 in Castle Rock.

Horses at the Dumb Friends League Harmony Equine Center will get a dental checkup from Colorado State University College of Veterinary Medicine on May 16, 2017 in Castle Rock. The students were under the supervision of CSU faculty member Dr. Luke Bass as they perform dental floats on nearly two dozen horses.