The fence is not accessible to me

In a household  large live twelve live beings
Six are human, six are cats and dogs
So in my garden now what am I seeing?
Death to hedgehogs, worms and tiny frogs

The Chinese dogs so strong and buoyant  roam
Across  my garden where they seek my touch
Alas  they don’t respond to , please go home
As my garden is so deep and rich

Apparently it is my  fault that they get in
I should erect new fence  or build a wall
I’d better  suit St Bernard’s from Berlin
I wonder if three metres high ends brawls?

The fence is not accessible to me
If I should die   please tell the BBC