Discussions

My year old pup hasn't been eating well. Its almost 7 pm and she hasnt eaten since breakfast yesterday. In addition, she has been throwing up bile - once a few days ago, last night, this morning and this afternoon. Everytime I take her outside to do her business she eats grass, which I think is supposed to help her be sick (correct me if I'm wrong - animals eat grass to make them sick right?)  
 
About a month ago we opened a brand new bag of Iams puppy food. This was the second or third bag of Iams she had eaten. Maggie, our dog, ate the first bowl full and was sick twice shortly after eating. Since then, she has not been willing to eat. She used to gobble down her food at every meal. But since that first bowl she only seems to eat when she is extremely hungry and cant ignore it any longer.  
 
Does anyone have any ideas as to what is wrong with her? She's not herself lately, and we are hoping to be able to get her better on our own. You pet owners out there must understand the high price of vet visits. So if anyone out there has any information or suggestions, I'm all ears.  
 
Thanks for listening,  
 
~Maggie's concerned mommy