Are bully sticks safe?

I have a 15 month old 18lbs male who is quite energetic and loves to chew. Are bully sticks safe for a fragile cavapoo? He has a bit of a sensitive stomach which was worse when he was a pup but has gotten much stronger. Maybe letting him use it only a few minutes a day supervised. But then I’m scared of sharp pieces breaking off or choking.

Am I over worrying?