Lap of Love. Quality of Life
www.lapoflove.com/Quality-of-Life/Determining-Pet-Quality-of-Life

Doctor, How Will I Know? 
www.lapoflove.com/Quality-of-Life/How-Will-I-Know-It-Is-Time

Quality of Life Scale 
www.aplb.org/resources/quality-of-life-scale/

What is Quality of Life?
csu-cvmbs.colostate.edu/vth/diagnostic-and-support/argus/Pages/quality-of-life.aspx