I bath the Rock about 2 to 3 times a year.
(in the winter he just gets a quick hose off on his legs & paws so he doesn't bring a lot of mud into the house.)
When he was young I rarely had to trim his nails, he filed them down naturally with his scratch dance.
Now that he is old, I have to clip his nails every couple of weeks or so.
I tried brushing his teeth when he was younger but with his
gums and tongue getting in the way, I gave up and I just give him bones to keep his teeth clean.