What is the ruling on selling cats, and is it obligatory to advise everyone who sells them about that?

The jurists have differed concerning the ruling on selling cats. The majority of scholars are of the opinion that it is permissible to sell them, while others have gone to the extent of prohibiting it. You are not obliged to contact the aforementioned website and advise it, because selling them is a matter of disagreement in which one is not denounced for adopting one of the opinions. However, if you do contact them, explaining the evidence of those who hold the view of prohibition, there is no harm upon you.