I was advised by a vet that the only company with a licence to sell it mail order was SPR. This was at the National Poultry Show last year, but he then went on to say that the rules were being relaxed soon to make it easier to get licenced. Its cheap enough and they have changed their packaging and their courier -we had 3 broken bags of 5 last year and one was empty, just the packet with a few pellets left. The delivery man apologised and went on to say that if I saw the way they threw stuff around at the depot I'd be amazed that anything survived! I reported that to SPR obviously.