A year and a half ago, our girl springer, Gibbon, got a toxic reaction to an antibiotic that she had taken all her life...she gets urinary tract infections usually once a year. Anyway, she went into liver shut down and spent 5 days in ICU at UT vet hospital. It was a very expensive bill...and she has been great ever since. Still, given that she is almost 14 (May 31), I don't know if we would do that again.
I love her with all my being...she's mommy's girl...but.
Don't regret your decision. Rejoice in the time you had with her. That's what I will do when Gibbon (and Madison) are gone.