Playing with Aperture

I use my dog walking time as prime photo taking time!
Ideal really, let Belle off her leash, let her run, & I take pictures,
I'm sure someone thinks I'm cruel for ignoring her.
I assure you I don't, or she'd be long gone by now!
Today I did take some exceptional pictures!
Humble, I know!
I've started playing with the aperture,
what's the point in having a dslr if I don't see what it's capable of really doing?
Not sure which one I like better of these two pictures,
yes, its the same scene, but two different settings for aperture!
Gives the picture a different feel,
I think I like the top pic,
colder looking,
appropriate, seeing how it is winter!