Neutering is often recommended as a behavioral solution in dogs, but this new study by Kolkmeyer et al. (2024) suggests that its effects are far from uniform. The research investigated behavioral differences in neutered and intact male dogs across two distinct breed clades—“Huskies” (e.g., Siberian Husky, Akita) and “Bulldogs” (e.g., English Bulldog, Boxer).
Based on a detailed behavioral survey of 136 male dogs (67 neutered and 69 intact), the study found that neutered males from both clades showed significantly more aggression toward humans (p = 0.002). When examining inter-dog aggression, “Huskies” were significantly more aggressive than “Bulldogs” (p = 0.04).
Stress-related behaviors also varied by both breed and neutering status. Neutered “Bulldogs” were notably stressed, while “Huskies”—regardless of neuter status—exhibited more overall stress indicators. Statistical analysis revealed a strong effect of neutering on both stress and uncertainty (p < 0.001, Cramer’s V = 0.42).
Personality data using the Budapest questionnaire showed that “Bulldogs” scored significantly higher in extraversion than “Huskies” (p < 0.001), adding further nuance to breed-based behavioral profiles.
The findings underline that neutering is not a universal solution to behavioral problems. The study warns that gonadectomy cannot replace proper socialization, training, or emotional bonding. Since not all behaviors are hormone-driven, each neutering decision should be made carefully and on a case-by-case basis.
Source: C.A. Kolkmeyer, J. Baum, N. Warlich-Zach, and U. Gansloßer, BMC Veterinary Research, June 3, 2024.
