Answer:
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
I go through a door but never go in, and never come out. What am I?
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
I can be long or short. I can be grown or bought. I can be painted or left bare. My tip can be round or square. (one word)
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.