After trying all training methods, at what point should an owner consider using a bark collar for a younger dog?

Hello Cindy,

After trying all training methods, at what point should an owner consider using a bark collar for a younger dog? The dog I'm considering on adopting is an 8 month old English Cocker spaniel. The current owner has allowed me to keep him for a trial period. I don't reprimand when he briefly barks for his dinner as he's a typical Cocker and loves his food or when he's outside and sees other dogs. However, I've filmed him while I'm at work and have observed him barking most of the time in his crate despite plenty of toys including interactive, food toys, etc.

I live in a condo, so I have to be mindful of the other tenants. He's fine when he's out of his crate or in his crate while I'm home. He is not yet housebroken so I've not transferred him to an expen.

Thanks,
Christina