Veterinary authorities have issued a warning to livestock owners about the risks associated with reselling and exchanging remaining doses of bluetongue virus serotype 3 (BTV-3) vaccine outside official channels. This concerns cases where farmers with unused vaccine doses attempt to sell or exchange them through internet platforms, social networks, or direct agreements with other animal owners, bypassing veterinarians and official suppliers. Specialists note that such practices can be dangerous because transportation and storage conditions for vaccines are often not maintained during unofficial transfers. Violations of temperature regimes and storage requirements can render the vaccine ineffective or even harmful to animals. Furthermore, vaccine use without proper veterinary oversight complicates tracking the vaccination status of herds and may hinder efforts to combat disease spread. Bluetongue is a viral disease affecting ruminant animals, primarily sheep and cattle, transmitted through bites of midges. Serotype BTV-3 has recently raised particular concern among veterinary services due to outbreak cases in several regions. Vaccination is considered one of the key tools for containing virus spread. Authorities recommend that farmers and animal owners purchase vaccines exclusively through licensed veterinarians and official distributors, and when they have surplus doses, consult with specialists about proper disposal or return of the products rather than seeking buyers independently. According to experts, this will ensure animal safety and the effectiveness of vaccination programs overall.