10 month old Springer is becoming very hard to handle. He launches himself at us quite a lot, grabbing and ripping clothes. He's scared my teenage son as he did it on the stairs, nipping him hard on his backside. We tell him no and walk out of the room for him to calm down when possible but he also does this when on lead walks when he needs to leave another dog alone. No amount of high value treats can distract him. He did this as a young pup, calmed down, but upped it as a teenager. He was neutered a month ago.
At home he has taken to chewing the carpet on the stairs (he's already ripped a hole in the sofa). We're pretty sure it's when he is tired, so we put him in his crate. The main issue here though is he wants to chew soft things to calm himself but he eats them. We have had to remove all soft toys and his bedding for fear of bowel obstruction. At this point he does not want his yak milk chew, antler, Kong, coffee wood chew - only soft stuff.
Any advice?
He currently gets a 50min off lead run around in local country parks each morning and 40mins on lead walks (to practice loose lead walking) in the early evening - as well as lots of brain toys and enrichment activities. He is with a dog walker fridays who says he is great with other dogs (he is when off lead with us too).
TLDR - how do we stop the mouthing and clothes ripping, how do we stop the soft furnishing destruction?