What is a "shaded dog?"


Hello!
I am just beginning to learn about old classical records? Can someone give me a brief education on what are collectible records. thanks
umaasa
Also make certain that they are LSC (stereo) as there are tons of LM (mono's) around. Some of these are OK as well if your system is setup to play mono. Even the non-classical LSC's that I have are nice recordings and should not be passed up, if inexpensive (I pick them up for $1 @ the thrift's if the LP is mint - don't care about the covers).
I thought "shaded dog" was the effect of taking a leak behind a concrete support column in the parking garage at the mall.