I took Sadie for a walk after her "accident" today (she pottied on the floor). I noticed that her tail is almost all white now (it used to be a ginger color). She's near 11 years old but she is still a sweet puppy to me. I wrote to the website, A Letter to my Dog, back in 2013 about Sadie.
http://www.alettertomydog.com/2013/05/dear-sadie-2/