Our 13 year-old lab has been sick for over a week now. She got into some charcoal and she's been throwing up about 6 hours after she eats. She saw her vet on Saturday and is now on an antibiotic. I decided after she got sick last night that she's off dog food for the time being and we're going to try chicken and rice. On top of this most recent problem she's been mysteriously losing weight, 9 lbs over the past 4 months. Some weight loss is normal in "senior" pets, but this amount is a bit alarming. The vet took x-rays and noted she has enlarged tracheobronchial lymph nodes, which could indicate cancer. At this point she wasn't sure if they were inflamed due to her vomiting, or cause for concern. Since she's getting skinny, we're really anxious to get her over her upset tummy and start fattening her up! We are both realistic about what kind of time we have left with her, its just painful to think about her being sick.
UPDATE 2/7: Sadie has now been vomit-free for 24 hours. She is really loving her yummy chicken and rice meals. I hope to start getting more weight on her. She's getting bony!