just joined, but saw this thread. had my 16 yr old lynx point(mr. fuji) PTS after good battle with CRF, a year ago, and just adopted a great snowshoe yesterday. i planned on using the list i found on one of the crf support sites, based on eating, drinking, urinating, ability to get around, and individual indicators of quality of life. turns out he stopped drinking, peeing, then eating and went into hiding, would barely look at me etc. it's so hard to know because they hide their symptoms so well, but hope this helps. was definitely hardest decision i've made, but sometimes we have to do it for them, and put our feelings aside....easier said......