It is never easy to make that decision and the last act of kindness and compassion for our little friend/s. I had to do the same 3 times Jan/Feb 2008. Take peace in knowing that your Timmy is well again, romping around and waiting for you at the rainbow bridge.
(It's about 4am, my last night shift and on a break, choking back a lump in my throat. The supvr wouldn't understand.)
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Zack, Zeke, Zoey, Zipp RIP 6/28/12