Day 8 - he's back to being a bit bonkers so maybe those hormones are really fighting each other now. Got completely stressed out for 2 minutes when he couldn't get to another dog on our walk (just sheer frustration and over threshold) and sounded like a mix of Cujo, Fluffy and Cerberus (not actually sure what Cerberus sounds like, but you get the drift) Not sure if the implant will help this, or it will just have to be time and training. Back to normal after a few minutes so it wasn't a long lasting thing.