Thanks all. They found that "Muncnkin", (she's a Pug dog) got the internal cancer. The oncologist gave her a shot forgot the name) and told me that after 24-72 hours reaction, she will be ok for a week or so, and if I want to continue with the chemo, she's probably stay alive up to 6 or 8 months. Should I let her go peacefully or keep doing it?...it was pretty sad...my son loves her a lot. He cried most of the time to see her suffering from the medication.