we have the exact same problem with our 3 year old westie. every so often (once a week or every other week) he secretes this disgusting liquid from his tush, and it usually has a little brown spot in the middle of the stain. it smells very strongly like fish. i had his anal glands expressed everal times but it didn't help at all (within a couple of days he was doing it again). one vet told me the next step is to have the anal glands removed, but that it could be a dangerous surgery and if the surgery goes wrong, the dog will be incontinent. i'm not sure what to do. we've tried everything! he is ruining all of our furniture, clothes, etc. has anyone solved this problem without surgery?