 about why dogs age so fast. I've had this debate with my friends. It's a very curious thing. Their mammals, were mammals, were as different as you can be biologically, were quite similar. But even the mechanical parts of a dog, the hip bone in me will last till 75 or 80 if I'm lucky, and a dog starts to go at 9 or 10. What do we understand about why this happens so quickly to dogs? Okay. Okay.