At that point, dogs often do feel bad: poor appetite, coughing, fever, sometimes difficult breathing, sometimes even coughing up blood. (yourpetsbestfriend.com)
(Without putting him in the hospital because we do nt have the $ $) Also how long after coughing up blood do they have to live? (1800petmeds.com)
The result is an extended scene with the character choking and coughing up blood before he dies. (parentpreviews.com)