Horses can not vommit so that wouldn’t be a symptom
Thank you so much for your answers
Hey Anna! As the cancer begins to spread throughout the body it begins to metastasize and create additional masses. Some forms of cancer become apparent only when the cancer is in an advanced stage and outward symptoms begin to present.
Most commons symptoms are: bleeding, diarrhea, odor, poor appetite, vomiting, weight loss.
But if you have any doubt you should call your veterinary!
Depends what kind of cancer? Weight loss, muscle loss, chronic diarrhea, listless/lethargic...