Identify the type of sonnet, the modifications, if any, the poet has made to the form, and the volta.

Golden Retrievals

BY MARK DOTY

Fetch? Balls and sticks capture my attention

seconds at a time. Catch? I don’t think so.

Bunny, tumbling leaf, a squirrel who’s—oh

joy—actually scared. Sniff the wind, then

I’m off again: muck, pond, ditch, residue

of any thrillingly dead thing. And you?

Either you’re sunk in the past, half our walk,

thinking of what you never can bring back,

or else you’re off in some fog concerning

—tomorrow, is that what you call it? My work:

to unsnare time’s warp (and woof!), retrieving,

my haze-headed friend, you. This shining bark,

a Zen master’s bronzy gong, calls you here,

entirely, now: bow-wow, bow-wow, bow-wow.

http://www.poetryfoundation.org/poem/176664

This is a Shakespearean Sonnet with the main exception being the rhyme scheme. However, I would still consider it Shakespearean because it is divided into the quatrains, and the volta comes at the correct location.
The main modifications are in the rhyme scheme and meter. (So mainly the only thing making this a sonnet is the number of lines and the fact that poetry foundation said so....) The meter is sort of all over the place with many substitutions, that is if you chose to say it should be iambic pentameter. There is rhyme involved but it doesn't follow the Shakespearned format.
The volta is at the end with the couplet. Typically we think of owners being in charge of their pets or atleast equal, and the poem starts out with the dog and the owner doing their own things but the volta shows the dog's power in the relationship, indicating the volta.

The main reason I chose this poem is it is more modern than most of the stuff we have been reading and it was interesting to see how something this abnormal is possible in such a traditional form.
Maybe part of the reason the poet chose a Sonnet is because they wanted to take an idea and then change it and skew it, sort of like the reader's perception of a owner/pet relationship.