Coccidia in a nine week old pup would be water butt, not pudding. There's also a fairly unmistakable odor like very ripe tennis shoes.
This sounds suspiciously like overfeeding. If he's simply going by what's on the package, just back off (as much as half) and see whether the poop gets better. If that doesn't work, then definitely get to the vet.
If pup is not up to date on shots and worming, a checkup is also in order.
Becca Shouse: Irena Farm, Semora, NC

Cord, Ted, Gus, Zhi, Maggie, Lynn, Lu, Min and Tully
Waiting: Bubo & Ben
"We didn't have a phone, and we couldn't call you!" Helen, AIDS orphan. Don't let them die of ignorance - WorldHelp.net
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Start 09/15/08: 186.4 lbs Current 185.5 lbs