Hi bin_me_uk,
All new stories are welcome, subject to these complying the site rules. Recommend you read Gromet's guide for authors, and obviously write something new.
Hi blarg,
You are correct, Gromet does not permit stories about scat. However, it is foreseeable that if you ended up in the trash, it might contain all sorts of stuff from diapers, to other people's dog's poo (which I have witnessed dog walkers dump in neighbour's bins). So you might share your experience with poo. Just try not to focus too much on that, if you are able. Some stories have included toilet contents, so just tread carefully, if you excuse the pun.
Daffy