Just had to order a new tub of Flubenvet, gives 20 doses so lasts my 5 girls around four applications, hence two years' worth. I've just finished up the previous tub, but am re-ordering now as Flubenvet powder has such an annoying habit of going completely out of stock for months on end without warning. Every time I get some I'm astonished at how much the price has gone up. Now around £30 per pot, I,e, £1.50 per bird per 7-day course. Used to be half of that, only two or three years ago.