Ha ha my son at 9mths bit my toes incessantly--I even posted a question about it on this site. I took into account all the suggestions, nothing worked at all. And as so many moms mentioned I really should nip it in the bud or it could become a huge problem down the line.
Well its a huge problem at almost two he's still biting. Once he figured out that the bite got reaction out of his brother, to his favor, it was no longer the loving, playful, pain relieving bite. IIt became his weapon. And IT gets horribly bad when he's teething. We are finally on our last 2 year molar, I'm praying once it cuts through the biting will slowing disappear.
The only recent thing I read online that I didn't think of trying, and I don't know how it would work with a 9 month old! But I read somewhere that a mom took a plastic tubing (kind of like off the filter of a fish tank) and made a necklace, and whenever her son started biting she'd put it in his mouth, and tell him he can bite this. She said he'd walk around with that thing in his all day long, and days he kept it in, the biting was to a minimum!
Good Luck sure hope you find something that works :)
PS I'm sure you'll get probably the same answers I did, but here's the link to my post a little over a year ago
http://www.mamapedia.com/questions/11445651174414417921
