Research overview: timing of eye and ear opening in felid neonates

Newborn cats are born with sealed eyelids and closed ear canals, and the timing of their opening marks early developmental progress used to age young animals. This overview surveys data on when eyes and ears open across felid species and how this timing relates to overall growth and the onset of sensory-guided behavior. It considers variation among species and individuals and how these milestones, together with body mass and tooth eruption, allow field workers to estimate the age of cubs found in dens. The review connects sensory development to the emergence of mobility, play, and eventual independence. Documenting these milestones supports both captive rearing and the interpretation of wild cub ages in field studies.