My 6 year old Golden Retriever Mix named Dakota is undergoing Chmotherapy for Malignant Histiocytic Sarcoma in his lung, and I was wondering if anyone else has been through this and if they had any tips. I am very worried because he had his second chemo treatment Monday and he crashed 7 days after his first chemo treatment. I was so sure he was going to die that day. We rushed him to the vet and they made him feel better, in fact he was genuinely happy for several days. My problem is the vet can't guarantee he won't crash this time so I was wondering if anyone had any advise. Thank you so much.