Do you find the food as a treat enough? Baiey gets it as a treat now but only one a day. I think I will increase it.
I don't buy Marrow bones because Buddy is unable to have them. I do buy the sertile one and bailey uses it more to tease Buddy then to chew it. when she does chew on it she doesn't use her back teeth like buddy.
Is the Hill's a dry food? I wouldn't feed it purely on ingredients alone BUT I really can't see how feeding kibble can help. The only way to remove plaque off the teeth is through surgical cleaning or by hard chewing -- chewing bones being the much cheaper and more pleasant option.