a poem about a stray dog

there once was a stray dog
always loyal to his many owners
but they were never loyal to him

he was young and happy
when he first got adopted
bouncing with joy
still when they left him

older now, but still friendly
some people came and gave him a new home
but eventually like the last
they left him in the past

now hes an old dog
not trusting society
not a broken bone in his body
but a broken heart

humans now are angry
"what a distrustworthy animal", they say
"no wonder they left him here", they say
when he threatens to bite them,
the try to kill him
not knowing that their own actions
made a happy pup
a stray dog