Answer:
I am so delicious that I require a house to contain me.
A little pool with two layers of wall around it. One white and soft and the other dark and hard, amidst a light brown grassy lawn with an outline of a green grass. What am I?
Canine children.
I am a busy worker who is a water mammal.
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.