Answer:
What has a bottom right at the top?
Iron on a mammal. Mammal on your feet.
A tiny bead, like fragile glass, strung along a cord of grass.
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not
My first is in some but not in all. My second is into but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing, rugs used every day.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.