They don't seem to be producing the coffee ground bedding any longer.
I would avoid using coffee with chicks only because they are still figuring out what is good to eat because they don't have a mother hen to show them. There is still residual caffeine in the grounds and a chick could die from eating too much of it.
I have used coffee ground bedding on the poop boards in my coop with my adult flock and had zero issues. I also got Grounds for Gardens from Starbucks to dry and use for bedding. It's nearly impossible to dry it enough for storage. I'd spread it out in a large tote in the blazing sun and stir it all day, cover it with plastic overnight to protect it and stir again the following day. It looked dry. But after a week in the storage tote when I opened it to get a few scoops for the boards, the inside of the container was covered in condensate and the grounds had started to mold.
For chicks, I use large disposable potty pads the first three days then switch to pine bedding, the same thing I use for coop bedding. The only batch of chicks I got after the original flock grew to adults were brooded in the coop in a build in brooder so they were raised with the adults. You can use whatever dry, absorbent, low dust bedding you want. I never liked using sand as it added more dust to an already dusty environment.