Hey there! Our guy just turned 6 months and has all the same obsessions, particularly with sticks and shoe / hoodie strings. Here’s what w ground worked best:

• This ramen themed string toy has shoe string “noodles” with fabric pockets of “veggie / meat” that you can stuff treats or kibble into. Our bernedood loves this so much, he plays with it even when no kibble is left in it. I’d recommend hot gluing the bundle of strings to the bottom of the ramen casing so it doesn’t get separated

• To replace outside sticks that can splinter, we give out boy Dogwood from Petstages in the small size

• For general nose and paw work when feeding, we also use this puzzle toy that requires him to paw at the levers to access each portion of kibble. Great mental stimulation and he still plays with it without food involved when he’s bored!