Getting exercise from walking a dog provides many benefits.
Do you have dogs?  We have three, but they are small.  Walking too far with them results in carrying them back to the car.
I do.   I find it amazing all the varieties from millenia of selective breeding.
It's kinda funny.  My husband says that all the mixed breeds now, like the chi-weenie, used to be mutts - now they are pricey specialty dogs.
The sad thing is that in the past we would have called them mongrels or mixed-breed.