what effect does aspirin have on dogs
If you are giving aspirin you will have to watch your dog for the following side effects: 1  Black tarry stools (suggesting digested blood) 2  Presence of blood in the vomit (suggesting a bleeding ulcer) 3  Nausea. Vomiting. 4  Diarrhea. Ulcers.  Loss of 1  appetite. Lethargy.  Anemia (suggesting stomach bleeding)