You bring home a toy. Within twenty minutes there is stuffing on the rug, the squeaker is out and sitting in the middle of the floor like a trophy, and the toy is finished. You have now done this eleven times and you are starting to take it personally.
They are not being difficult and it is not a training failure. They are doing exactly what the toy is shaped to make them do.
The whole sequence is built in
Dogs inherited a predatory sequence from wolves: find, stalk, chase, grab, kill, tear apart, eat. Breeding has emphasized different parts of it. A border collie is all stalk and chase with the grab bred out. A terrier is heavy on the grab and shake. A retriever grabs and carries without the tearing.
A plush toy with a squeaker in it is, from your dog's point of view, a small animal that makes a noise when bitten and goes quiet when you get to the middle. They are not destroying it, they are finishing it. The squeaker going silent is the point of the whole exercise, which is why so many dogs lose interest the moment they have it out.
The three reasons behind it
The instinct itself. Some dogs need to shred the way some dogs need to run. Take away every opportunity and it reappears somewhere less convenient, usually a cushion.
Boredom. An understimulated dog will make their own entertainment out of whatever is nearest. This is the cheapest version of the problem to fix, and the early signs of boredom usually show up well before the chewing does.
Stress. Chewing releases tension. A dog who only destroys things while you are out, and who targets doorways, windowsills and the things that smell most of you, is not bored. That is separation distress and it needs a different approach entirely.
Stop buying toys that promise to survive
Nothing is truly indestructible, and toys marketed on toughness alone tend to be hard enough to be a real risk to teeth. Slab fractures on the upper back molars are common in dogs given very hard chews, and they are expensive and painful.
The better test is simple: if you cannot make a dent in it with a thumbnail, it is too hard for your dog's teeth.
Split the toy box into jobs
Most people buy one kind of toy and wonder why it does not cover everything. Try four.
To shred. Cheap, safe, expected to die. A cardboard box, a paper bag with kibble in it, a cheap plush you have accepted the fate of. Supervise, and take the pieces away.
To chew. Something rubbery that gives slightly. This is the one that lasts.
To chase. The part people forget. A dog who never gets to chase anything takes the chase out on the shredding toy. A ball that moves on its own covers it without you throwing for an hour, and there are a few versions depending on how quickly your dog works out a pattern.
To grab and pull. Tug is the safe home for the grab and shake instinct, and letting your dog win does not make them dominant, which is an old idea that has not held up. A ball with a rope on it covers chase and tug in one object, which is useful for dogs who want both in the same five minutes.
Make the shredding legal
Rather than stopping it, give it somewhere to go. An empty cereal box with a few pieces of kibble inside is a puzzle and a shredding session at once, and it costs nothing. A paper bag rolled shut works the same way. You will have a mess to clean up. That is the trade, and it is a good one compared with the sofa arm.
When to actually worry
Swallowing the pieces rather than leaving them is the thing to watch. Stuffing, squeakers and rope threads cause blockages that end in surgery, and a dog who eats what they shred should only have shreddable toys with you in the room.
The other flag is destruction that happens only when you leave, aimed at exits, often with drooling, scratching or barking alongside it. No toy fixes that one. It is worth raising with your vet. What is safe to leave out in the meantime is covered in toys for dogs left home alone.