my dog is always hungry even he had eaten already! what's with him?

i dont know but i think its normal. my siberian husky is eating lots of food for lunch... an hour after that, you will see her chewing on something else. If she sees you eating, she will go near you and beg for a piece of what you have. After a while, you will see her eating some fallen leaves and rocks and pieces of wood. I dont know what's with her too... but I think we've got the same problem here... LOL...

I think it's normal for a dog. I have a dog like that too. Imagine he just ate a piece of wood! It's not bad giving him a diet because of health reasons. Give him water diluted with sugar once in a while to keep him from getting sick.

If it's a puppy then you might have her checked for tape worms. I know you said she was wormed, but not all wormers work on tape worms. Otherwise, maybe she's just growing and needs the food.