mattress stain: dog drool, or pee?
Fairly new mattress. Today noticed very pale stain near the foot of the bed, an area about 2 ft square, where Abby likes to sleep under the covers - until she overheats, starts panting like mad, and crawls out, waking us both up of course. :) Anyway, DH is convinced it's pee. I know she drools under there. I am thinking, if it was pee, the stain would be darker and it would smell, and we'd have noticed it way before now. What do you all think it is? Please, advice wanted! Thanks in advance! (I did already clean it with hydrogen peroxide and Oxyclean, came out about 95%. Just the stitching is a tiny bit yellow still.)