Hi! Beans has some brown spots on the front of his gums. At first I thought maybe it was just some stuck food but it’s been there for a while so I think that it is plaque or the start of periodontal disease. I wanted to try the Maxi guard and betadine, but I just want to make sure I get the right stuff. Can someone tell me exactly what to get? Seems like there was a lot of options online. Thanks!