Litoris, occasionaly domestic dogs express their own anal glands when they are over-excited, scared, or if they passing stool after a period of constipation. If it is REALLY fould smelling-fishy-oily material that looks more like diarrhea, but only in small amounts (less than a teaspoon), it's possible your chi expressed its own anal glands. Lovely, as long as it's not on carpet or your shoe =)
Luvmypuppet, there are 2 ways of expressing anal glands, externally and internally. What you're describing is internal, the good ol' 10 and 2, manually palpating each anal gland from the inside of the anus. For dogs under 10 pounds, I normally express the anal glands externally by palpating them from the outside. This method doesn't express the glands as completely, nor does it allow you to feel the texture of the gland (looking for granulomas or polyps), or how full they are. However, it's more comfortable for everybody, so we do it this way on a regular basis.
-Nate