I bought Valbazen to worm my flock today. It went really well. 0.5cc on a piece of bread, and they each politely gobbled one up each. I have one hen who's been a bit slow and just "off" for the past week. That usually tells me I need to worm, and quickly. However, today I'm seeing her laying on the deck, occasionally gaping and shaking her head. Her breathing seems a bit labored. I gave her yoghurt and boiled egg, which she gobbled down. She has her eyes closed a lot. I'm thinking she might have gapeworm. I know I need to hit it hard and fast. So she's already had 0.5cc Valbazen. Reading on here, it sounds like Safeguard might work better? What should I do now? Should I give her Valbazen in 3 days, then in 3 days again, or should I switch to Safeguard in 3 days?