Bella: A dog that no longer comes when called

she used to come when called
when she was a little younger,
maybe a little concerned I'd drop her back
at the Humane Society if she didn't stack up to
my requirements, rather tall as they were.
three months in, she knows she is with us for keeps, 
she looks up at me now, confident in her place with us,
and goes right back to what she was doing.
oh, she has gotten so bold, so sure that there
are no real consequences and the cheese in my hand
does not compare with the dead bird buried under an inch
of frozen mud, or the spoiled hamburger wrapper
blowing across the snow-covered field.