Can dogs smell time? Ask Donut the dog! : Goats and Soda : NPR

Dogs, like people, use many environmental cues to estimate the time during the day, she says. They listen to their body’s physiological signs, such as a growing rumble in their tummies, hint of drowsiness or a growing need to … you know, go outside. Just like humans, they have fluctuating hormones that help create a built-in clock in their bodies and minds.
— Read on www.npr.org/sections/goatsandsoda/2022/12/22/1139781319/can-dogs-smell-time-just-ask-donut-the-dog