There is a dreadful smell coming from one of my carpets. I initially thought one of the children had weed on it but I can’t get rid of the smell at all-I don’t know how but now I’m thinking it may be an animal of some sort! We don’t have any pets and have shampooed and used freshener but the smell will not go. Does anyone have any tips please? It’s a fairly new carpet (less than two years) so we really don’t want to replace it. Thank you!