Xerex bilco's young bird sickness treatment have to say is a product that is irreplaceable, and i will defiantly be buying some in next year just in case next years young birds get the sickness. I cannot get over the rapid improvement of the birds, birds that looked terrible to birds that look like super stars. Xerex is also cheap as chips i know one thing its under 48 hours and I'm really impressed and 3 sachets for a tenner don't think you can go wrong, especially as its a sachet to a gallon. One things for sure my cupboard will not be without it again.