Division-dependent telomere shortening correlating with age triggers senescence on a cellular level and telomere dysfunction can facilitate oncogenesis. Therefore, the study of telomere biology is critical to the understanding of aging and cancer. The domestic chicken, a classic model for the study of developmental biology, possesses a telomere genome with highly conserved aspects and distinctive features which make it uniquely suited for the study of telomere maintenance mechanisms, their function and dysfunction. The purpose of this review is to highlight the chicken as a model for aging research, specifically as a model for telomere and telomerase research, and to increase its utility as such by describing developments in the study of chicken telomeres and telomerase in the context of related research in human and mouse.
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