Table 1.

Epidemiological data and results of pre- and postoperative clinical examination of the study group

Number	Breed	Gender, age, bodyweight	Clinical signs	Postoperative clinical signs
1	Boston terrier	Male, 3 months old, 2.5 kg	Obtundation, mild ataxia on all four limbs, circling, aimless barking	None
2	Mini Australian shepherd	Male-neutered, 26 months old, 12.5 kg	Visual deficits, reduced menace, circling	Visual deficits, reduced menace
3	Peruvian hairless dog	Male, 2 months old, 2.8 kg	Ataxia on all four limbs, ventro-lateral strabismus, obtundation	None
4	Austrian hound	Male, 54 months old, 20 kg	Obtundation, circling, head tremor, hypermetria in the front limbs	None
5	Cavalier King Charles spaniel	Male neutered, 60 months old, 9.9 kg	Obtundation	None
6	Pug	Male, 21 months old, 9.2 kg	Obtundation, ataxia on all four limbs	None
7	Papillon	Female, 7 months old 3.4 kg	Obtundation, ataxia, head tilt tremor	None
8	Chihuahua	Male neutered, 3 months old, 1.2 kg	Obtundation, mild ataxia, spasticity in all four limbs, reduced menace response	None
9	Australian shepherd	Male, 4 months old, 13.9 kg	Visual deficits. reduced menace, nystagmus, hypoactive	Visual deficits, reduced menace
10	Jack Russell terrier	Male, 4 months old, 4.7 kg	Obtundation, ataxia on all four limbs	None
11	Bullterrier	Female, 25 months old 12.5 kg	Intermittent obtundation, head pressing	None
12	Maltese mix	Male neutered, 6 months old, 6.1 kg	Circling, obtundation	None