Only side effects I've experienced from prescribed drugs was when I got pseudoephedrine for something. I thought I was having a panic attack, a heart attack, and had just finished a marathon, all at the same time. Super uncomfortable arrhythmia. Not something I'd like to repeat.
The cardboard box sounds like a good plan. I've used a small plastic dog carrier for transporting three landrace cluckers, you could probably fit four leghorns in one too. They don't really need to be able to move all that much, it's only a couple of hours.
The cardboard box sounds like a good plan. I've used a small plastic dog carrier for transporting three landrace cluckers, you could probably fit four leghorns in one too. They don't really need to be able to move all that much, it's only a couple of hours.