Introduction: Excision arthroplasty were performed on 20 cats and 64 dogs with hip lameness. Results of clinical and radiological findings were evaluated, starting immediately postoperatively and continuing in 3-month intervals, for a period of 1 year. The findings were compared.

Results: It was found that there was an inverse relationship, between clinical and radiological findings and progress of recovery, with increasing body size. It was determined that animals weighing between 3-10 kg had a very good results, those weighing between 10-18 kg had a good results, and that some cases, regardless of breed, age, and body weight had a mild improvement in clinical results. The fact that results of this operation carried out in puppies of large breed dogs aged between 2-9 months are similar to those of cats and small breed dogs confirms the possibility of a relationship with body weight.

Conclusion: When cats and small dogs with diseases for which excision arthroplasty is indicated, are treated using this procedure, clinical and radiological results are very good. Provided technical faults in operations are minimised, clinical and radiological success is also satisfactory in large breed dogs.