Google "Pigeon supplies". There is a web-site called "Foys Pet Supply" Look under product catalog and see at bottom of list says "Wormers".There are sereval different kinds . Plus if you Google Pigeon Supplies, there are several web-sites that also provide pigeon supplies. I just Googled it to make sure of what I am stating here. Please look around the sites also for any antibiotics and etc. for any other meds. too. Hope this helps PS- sorry to bring this info a little late.The idea just clicked in my head when I read this thread.