One of my hens was diagnosed today with Roundworms. The vet gave us Fenbendazole pills for 5 days. I know I need to deworm everyone else so I asked for a recommendation for something to put in the water. He suggested Wazine17 but I cannot find it - even online. Some threads are suggesting that it has been discontinue. I would prefer not to have to pill all 7 birds. Any suggestions for a dewormer that I can put in their water to cover the rest of the flock?