@ntasd Hello! As for Willy's mysterious couch potty, it has disappeared as quickly as it came ... she has not done it again, she has resumed her usual routine of the B-500, which includes up. on over any furniture we are not sitting on, primarily we sit on the love seat.
I KNOW in my heart she was doing it to express SOMETHING, but whatever it was, I can't know! I DID for a couple days after the "events" not allow her to get on THAT couch, if my telling her to get down did not work, the sight of the spray bottle induced an immediate response, after a day or two of that, no issues!
As for biting your feet, O yes! and it hurts! I found that when she was younger (like 2 months ago!) that OW THAT HURTS and an abrupt stop would let me get hold of her, and I would pick her up and get EYE TO EYE and tell her FIRMLY "NO BITE" then release her and ignore her, NO eye contact, NO talking to her for all of 3-5 minutes, and it did not take long for her to understand that biting feet in motion was NOT acceptable.
She is still learning the difference between play biting and too rough, but is MUCH better, even when playing tug of war and fetch ( I know, B's don't typically fetch, but she does, and will do so for a really long time!)
I find that getting EYE TO EYE and a firm talking to ( I use the word SHAME, in conjunction with the infraction, which she seems to understand is an expression of my disappointment ) followed by completely ignoring her goes a long way. A few minutes of ignoring is all it takes, she does NOT like not being talked to or looked at. I firmly believe that these little demons thrive on attention, and if being good doesn't get it, being bad is the next GO TO. As for the crate being viewed as punishment, or used for time out, all my former B's, and this little one were / are aware that there is a definite difference between "good crate time" and "time out crate time" - I did / do the same treatment for time out - NO eye contact, no verbal intercourse, and not long in the crate on a time out resulted in a better behaved pup upon release. They completely understand the difference between a happy mama and an unhappy mama! And as everybody knows, If Mama aint happy, aint nobody happy!
I know you will ultimately reach your goal, it takes a lot of patience and love, the love part is easy, the patience part takes some work!