Abstract
Background:
Distal radius fractures are prevalent in small and toy-breed dogs, presenting significant treatment challenges due to complications such as delayed union or nonunion. These complications are often exacerbated by reduced vascular density at the distal diaphyseal-metaphyseal junction of the radius, which is vital for bone healing, particularly in toy and small breed dogs. Circular external fixation (CEF) is known for its effectiveness in managing acute and chronic fractures and providing temporary stabilization in humans. This study documented the use of temporary CEF in a Toy Poodle with non-union fractures of the radius and ulna, addressing bone atrophy and resorption caused by repeated implant failures.

Case Description:
A 3-year-old, 4.2 kg, neutered male Toy Poodle was referred for treatment after multiple attempts to fix for radial and ulnar fractures failed to achieve union over one year, leaving the dog barely using its forelimbs. In the first surgery, CEF was applied to heal holes in the bone caused by previous fixation devices and encourage forelimb use through rehabilitation. In the second surgery, a combination of cancellous bone grafting, plate fixation, and CEF was used, resulting in successful bone union and restoration of normal gait after 10 weeks.

Conclusion:
In conclusion, CEF is a valuable option for temporary fixation and fracture reduction in toy-breed dogs and offer a promising approach to managing challenging cases.

Key words: Circular external fixation, Fracture, Non-union, Small animal, Toy-breed dog