Yes, completely out of order. Even clothes washing is not permitted in those sinks.

I hope you told the wardens so that they could disinfect the area and, hopefully, remonstrate with the hard of understanding dog owners.

It is the sort of behaviour  that should have been mentioned to the perpetrators or if not wanting a confrontation,the site staff need adviseing for them to deal with it

Well and truly out of order!!! But doesn't surprise me as so many caravaners have dogs and treat them like their baby, hence to say why THEY would think it to be acceptable to wash a dog in a washing up sink, wouldn't put it passed them to use the baby and toddler facilities!!!! Hope the sinks were disinfected, shame though, as more unecessary work for the warnens

Having seen someone washing a dirty dog bowl in a communal washing up sink I took the trouble to query the practice direct with HO. The reply was that it was absolutely fine. Personally I find the idea of washing my breakfast pots in a sink that has just been used to wash a dog bowl quite repulsive.