I don't know your weed, but my old French Brit is a burr collector par excellence! I wenttoTractor Supply some years ago looking for dog notangles shampoo. A young lady took me to the horse stuff and gave me a bottle of Mane and Tail. I asked if it was safe for dogs. She shook out a big pony tail and said, 'I use it!' I've used it on him ever since. Sray him down at the start of the day. The few burrs that stick come out pretty easily with an extra squirt or two and a gentle brush. He's a real sissy when it comes to getting tangles out.
Bfly

Be nice and work hard, you never have enough time or friends.