Were ship's cats a danger to stored sails?
Short answerThe larger danger was rats eating sailcloth, so carpenters and sailmakers valued cats for protecting their stores.
NotesRats eating sailcloth posed a greater danger than cats tearing stored sails. Carpenters and sailmakers therefore had good reason to encourage cats around their stores and workspaces. Ships could carry more than one cat, making pest control a practical part of material preservation at sea. The familiar shipboard cat protected stores essential to sailing and repair.