I've noticed there are a lot of knowledgeable people on here, so I'm hoping someone will be able to advise me how to give my (almost) 6-month-old terrier some mental stimulation because I think he really needs it!
I've tried him with puzzle games and a snuffle mat but he solves the problem pretty fast and gets bored.
He gets two walks a day and can play football or whatever in the garden multiple times, but he's just so high energy. My last terrier was lazy from day one so I'm not great at coming up with ideas!