Hi IZ,
Wow this is funny for me. Winslow will turn 6 months on 12/28 and you seem to be going through everything he has. We still have the leash in mouth issue. Not as bad as before.
We go to Puppy class, and they had us just snap the leash from his mouth with a correction. I hated doing that, and a few baby teeth did and will chip,
(Winslow didn't even notice the chipping) Now we didn't tug and yank the leash but a consistent snap (like shaking water from a wet paint brush) with a "no" each time until he lets go of the leash, then PRAISE LIKE CRAZY
and eventually he caught on.
Wait till the nipping the wrists starts. I bet that is one of your next posts
Rich