True animal story

One-legged seagull
sat on the roof near the chimney
it was a male gull, its feather
worn like he had been
in a battle and needed a rest
when my dog  noticed the bird,
she barked the gull
shrieked, hate at first sight,
but for a truce
When the dog ignored
its presence and
the bird stopped  teasing her
the kitchen had a flat roof
in the morning, the bird had flown
the dog picked at her food
on Sunday, she listened to the sermon  
when the dog heard the priest say
something about angels
the dog knowingly wagged her tail