I would schedule the dental cleanings asap, infection is painful and can lead to all kinds of medical issues. Then when they have recovered, I would gently brush their teeth daily. YouTube has some excellent how to videos.
Be aware that bones can result in GI blockage (even finely ground bone) and broken teeth, anything raw is potentially loaded with bacteria.
Per the search engine here:
/forums/topic/dog-not-digesting-bones-properly/
What more is there to test? Obviously the bones, even finely ground up bone material is causing potentially fatal stomach, colon and bowel obstructions.
/forums/topic/rectal-issues/
/forums/search/bone+obstruction/
Dogs are Still not Wolves: Human Feeding Practices Have Shaped the Dog Genome
PS: If the dog needs emergency surgery (not unusual) caused by these feeding habits, it will cost $$$ whether the surgery is successful or not.
http://skeptvet.com/Blog/category/nutrition/
http://www.fda.gov/ForConsumers/ConsumerUpdates/ucm208365.htm?s_cid=w_c_PetHealth_cont_001
https://www.mspca.org/angell_services/choosing-the-right-diet-for-your-pet/
/forums/search/bones+obstruction/
Hopes this helps
