Dr Arnold: "Washing is very messy at the start but ends with a clean deck and animals. Often the mess is transferred to below or other decks. During this washing process, sternally recumbent animals can often be seen chewing their cud whilst the sloppy mess drains on them from the upper deck cleaning,” says Arnold.
COMMENT: That is exactly what Lynn Simpson's much criticised photos show, faeces falling from one deck to another.
Dr Arnold: “The fecal mess will often dry on the animals giving them a permanent fecal crust. It might not be a good look to humans, but the animals aren’t the least concerned,” he says.
COMMENT: According to industry, faecal encrusted animals are not seen any more due to the "improvements" in the current standard (ASEL) but recent photos from Israel (2016), Dr Arnold's comments (2016) and Dr Arnold's own photo provide clear proof that it does.
Check out the excellent article on marine pollution with Dr Arnold's comments and an additional comment by VALE on : http://www.maritime-executive.com/features/live-export-following-the-effluent-trail.
NOTE: there have been no changes to ASEL since 2004 regarding deck washing and disposal of faeces.