1. Commercial Breeders: Many animals are specifically bred for research purposes. These breeders often work with facilities or organizations that conduct research.
2. Shelters and Animal Control: While not the primary source, some facilities may acquire animals from shelters or animal control. These animals are usually those deemed "unadoptable" for various reasons.
3. Wildlife: Certain research studies may require specific wild animals. These might be captured with proper permits or obtained through wildlife rehabilitation centers.
4. Farms: In some cases, animals like pigs or sheep might be obtained from farms. However, this source is less common than commercial breeders.
5. Research Institutions: Some research institutions breed their own animals for research purposes. This allows them to control variables like genetics and health.
Important Considerations:
* Regulations and Ethics: Animal testing is heavily regulated in many countries, with strict guidelines on ethical treatment and animal welfare.
* Alternatives to Animal Testing: Scientists are continuously developing alternative methods like cell cultures, computer models, and organ-on-a-chip technology to reduce or replace animal testing.
It's crucial to remember that animal testing is a multifaceted issue. While some people argue that it's necessary for scientific progress and human health, others strongly condemn it on ethical grounds. The debate is ongoing, and finding alternative methods is a key focus in the field.