Paws to reflect

I'm the one with four feet down,
The only one with purring sound.
The only kin I'll ever know:
The tall bipeds who come and go.
My meow brings sweet tuna meal;
I couldn't have a better deal.
From laps to naps to window sill,
That bird outside I'll never kill.
The one biped who turns my ear,
The one whom I hold to most dear:
He plays with me with stick and twine;
I play along, and I feel fine.
(The only times I'd soon forget
 Is when he takes me to the vet.)
I wipe my whiskers 'gainst a leg
for rubs I never have to beg.
My family are not like me,
But I'm as happy as can be.

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placed in Poets United Think Tank #23: Family