This disclosure provides non-human animal models for age-related disorders and age-sensitive traits, particularly those caused by senescence-inducing stimuli, wherein the models comprise transgenes selectively expressed by senescent cells. The disclosure further provides methods for identifying therapeutic agents effective for treating or preventing age-related disorders and age-sensitive traits using the animal models, therapeutic agents identified using such methods, pharmaceutical compositions comprising the identified therapeutic agents, and methods of treating or preventing age-related disorders and age-sensitive traits.