Tesoro is a beautiful dog. It is so very sad that his cancer
cannot be cured, just curtailed a bit. If the constant chemo
treatments are taking a toll on his enjoyment of everyday life,
then you are right to question whether to continue them.

I hope your Vet can give you more information & be of some
help in making any decisions about continued treatments. It's
so very sad to see our beloved pets so ill.