We give Safeguard at higher doses than normally quoted for use in water for three days and find it to be effective in worming with no harmful effects and NO loss of fertility in our tests. I would guess we would have seen feather issues if they existed. Of course most all worming effectiveness is circumstantial since it is not practical to actually measure some types of worm loads (capillary/cecal).Just found this link:
http://onlinelibrary.wiley.com/stor...au&s=48c3100c6bdd0c1b4cc987cdf52b880b21c9e1f8
It says that to treat capillary worms in most bird species to give fenbendazole at 50mg per kg for five days. That means to give the Safeguard amount listed in post number eight for five days in a row!
-Kathy
Fenbendazole is obviously has a high factor of safety with regards to dosage. The fertility thing with regards to fenbendazole is something that has grown legs and become legend. We have not specifically tested Valbazen with regards fertility but we have heard that it both does and does not cause infertility from folks we would trust.