With 90% feathers, heat probably isn’t an issue. Food, water, and cleanliness are definitely bigger factors.
The bin you have is a good start. Make sure the lid is well ventilated, and choose bedding that is absorbent and not too slippery. The motion of the car will make it hard for them to keep their balance, and with a slippery floor that might lead to leg injuries. I’d go with a thick layer of sand, at least 3 inches. Maybe even some heavy-duty wire mesh near the top of the sand so they have something to grab hold of. Just make sure the ends of the wire are tucked where the chickens won’t get hurt on them.
For food, I recommend either something that comes in a solid block, or else something sticky enough it can’t be spilled. Chances are they won’t eat much while moving, but it’s good to have it available.
If you don’t already mix food-grade charcoal in with their food, I recommend you start doing that a day before you leave, and add some to their travel food. Just a tiny bit will do. My ratio is about 1/2 a teaspoon per quart of food. This cuts down drastically on odors, and it also reduces the ammonia and other noxious substances emitting from their poop. Believe me, your lungs will thank you!
Water is the tricky part. I have yet to see a chicken waterer that won’t spill while traveling. My advice is to plan on stopping for about 10 minutes every 2 hours, and put their water dish in every time you stop. You can also stick an apple or other fruit in their feeder so they get a little water that way.
On short trips chickens tend to just hunker down and not move until they’re sure the vehicle is stopped, but for a 10-hour trip I’m sure they’ll appreciate some extra pampering.
Thank you sooo much for the helpful information!!!
I will do what you suggest.
They probably will eat the gruel I make for them and that does not spill...maybe when we stop.
I have been putting 1 tsp apple cider vinegar per quart of water.
I have heard some recommend chick electrolytes for traveling...Any thoughts on this?