@zande I'm glad to hear you're recovering from your surgery and get back to dog walking duties. Don't overdo it!
I realize most people hate flexi leashes, and I understand why. However for me I can make it work. I used to walk 3 basenjis on flexies. If you're not extremely and constantly vigilant, it can be a disaster. It also depends on where you're walking and whether or not you have the kind of flexi that has the thick Ribbon or the tiny, thin leg cutting cord. I have scars behind my knees from when I was a beginner. I'm sure this has already been discussed ad nauseam on this forum and I don't want to beat a dead horse. That being said, most people should not use a Flexi.
@JENGOSMonkey When I first adopted my b, he was super reactive to stimuli like other dogs and animals. He would spin like Linda Blair in The Exorcist. You have to be quick to stop him before he reacts. Even with the Gentle Leader.. Be proactive and anticipate what could happen. Make him look at you, sit or whatever you can do to get his attention off the other thing and on you. Believe it or not, he will improve. It just takes a little time, patience, consistent, gentle leadership and pawsitive reinforcement. Work on the recall. I can't say that enough. If you see a squirrel before he does, head in the other direction, call his name, make him come to you and make a big deal out of how good he was to come to you. When walking past other dogs, make a negative sound like tsch or unh unh and command him to "walk nice". Try to catch him walking nice and tell him what a good boy he is. "What a nice walk!" Try to catch him doing well and praise the desired behavior. My Moj literally strutts when I praise him for walking nice. It's so cute.