My mom has 3 choc. labs, all with bad breath and in need of dental care. However, she is too scared of anesthesia on these dogs and won't get their teeth cleaned. All three of them wolf their food down (not so fast as to bloat or choke, but there isn't much chewing going on) so their teeth aren't getting any scraping action from their food. What is the largest chunk size dog food that is available in the southwest? I am hoping there is something out there that these dogs would have to spend some time breaking down with their teeth before swallowing. Unfortunately, none of them like any of the dental/chew toys but they do love any type of dog biscuit. If only a dry dog food came in x-large biscuit size without the biscuit price...