Gavroche grinds his teeth seasonally. I have NO FREAKING CLUE why or how to stop it. Generally when he starts grinding I give him Melatonin twice a day. I don't know that it actually helps, but I like to think it does, and there's nothing more I can do for him. It drives me NUTS. Every year starting in January or February and continuing through March or April, he grinds his teeth. He's been in for exam, bloodwork, checked his teeth, tried him on ranitidine, NOTHING. He's been on Baytril for nearly 8 weeks now, so I'll be interested to see if it's first of all cleared up his UTI for good and second, if it had any effect on his seasonal grinding. I'm wondering if he's had a chronc low-grade UTI this whole time...
Anyway, yeah, I'm no help, but you're not the only one with a weird dog