I don't know if I'm too late to add anything to this post but I have to agree with Nancy re: Merrick.  I've tried to give Maggie (7 lbs) bully sticks and wishbones but she won't touch them...give her a flossie and she bolts and enjoys it with unbelievable joy under the chair in the living room so no one bothers her 

  She absolutely loves them and noticed her teeth are sooo pearly white and tarter free after I started giving her these!