We use CET veggie chews and just started buying bully sticks. I buy the 12" sticks and cut them up smaller. A 4" stick lasts Mario about 3-4 hours and he often has to take a few hour break in there.
He gets a veggie stick once a day and a bully stick will be no more than twice a week. The bully sticks can have bacteria on them that a pups system can handle if they don't get them every day.
__________________ Mario  was adopted May 2015. Now he is a service dog and brother to Bailey the Airdale mix |