Parents at Morriston Comprehensive School in Swansea are advising their children not to use the toilets after they were changed to unisex.
The toilets have separate cubicles for boys and girls and the doors reach from floor to ceiling.
The only shared area are the wash basins.
Both the school and Swansea Council say that the new toilets have reduced incidents of bullying and loitering.
More top news
The story of 1 of almost 100 puppies rescued from the illegal dog trade is being used to highlight the "shocking realities" of the industry.
The warning is valid until 11.00am
GPs say they have not been consulted by health boards about winter plans and as a result they may not be as robust as they could be