My 12 year old boxer was diagnosed with lymphosarcoma in March 2005. Because of her age and not wanting to put her through chemo, I decided to not treat her. I have had her on steroids since March, she continues to wheeze and recently her appitite has decresed. My question is, I do not want her to suffer and I need to know when and if I should put her to sleep. She remains active, but is continuoulsy losing weight. Please send me any suggestions.