Lately I've notice some of my birds yawning and flexing their diaphragm and it looks like gapeworm. Is gapeworm a dangerous threat to life or just an annoyance? Last year I saw the same thing and gave them fenbendazole in their water for a week, but I noticed it settled to the bottom of their water instead of floating in the water. I used safe-guard, which is actually a goat dewormer. Can anyone speak to the effectiveness of this approach or do I need to try something else? Right now my flock is about 26 hens, three roosters, 15 pullets, and 2 chicks, which don't have a good secure chicken coop, they either roost in a tree of in some smaller coops I have that are in a degree of disrepair. They are safe from predators because my dogs generally patrol the perimeter of their chickenyard, which is abut 1500 square feet. Their water access is scattered around in about 6 or seven containers/bowls that I set out so the chicks can easily water when they need it. However when it rains they seem to prefer to drink from puddles. What would be the best approach to deworming my 43 birds?? Thanks for your help.