The buckle can stay open for now. Start by helping your dog choose to put their nose inside the basket.

he new muzzle is next to the lead. Your dog is investigating the packaging while you untangle the straps. You only meant to check whether it fits. But there is no need to hear the buckle click today.
Muzzle training starts with voluntary approaches and rewards. Putting the nose inside, introducing the straps and wearing the muzzle briefly come later. Plan small sessions before you need it. Cornell describes the gradual introduction of the basket and straps.
A basket muzzle needs enough depth for your dog to open their mouth widely and pant freely. A narrow gap is not enough. Drinking must also be possible. The basket should stay clear of the eyes and avoid rubbing the nose or cheeks. The Vienna Animal Welfare Ombuds Office explains these fit requirements in its German guide.
Ask for a fitting assessment if you are unsure. A size label cannot settle the question. A tight fabric or nylon loop that holds the mouth shut is unsuitable for these exercises or walks: it restricts panting and heat loss. The German Veterinary Association for Animal Welfare, TVT, also distinguishes these loops from suitable baskets.
Begin at home with suitable food rewards, away from things that worry or excite your dog. These steps are a guide. They do not all belong in the same session.
Show the open muzzle without pushing it towards your dog's face. Reward a voluntary approach. If your dog keeps their distance, allow that space and start where they remain comfortable. Make the task easier when they hesitate. This approach follows the Dogs Trust muzzle guide.
Hold the basket still, with food near the opening at first. Later, place it further inside. Let your dog choose how far to reach and allow them to pull back. Once they readily put their nose in, offer the reward afterwards. Battersea describes this progression. Next, reward your dog for voluntarily staying in the open basket briefly before introducing the straps. Keep your fingers outside the basket openings.
Practise the click at a distance, without the muzzle on. Reward a calm response. Next, introduce strap touches. When these are comfortable, fasten briefly, reward and open immediately. Blue Cross explains this gradual introduction. Set the straps beforehand so you are not working out their adjustment on your dog.
Start with a few seconds and build slowly. Then introduce a few steps in familiar surroundings, continuing to reward. Blue Cross suggests adding movement after comfortable wear. A short walk towards you is enough to begin with. There is no need to cover your usual route yet.
Later, try another quiet location. Avoid increasing the wearing time at the same time. The Vienna guide recommends changing one training factor at a time. Your note might say: “Living room, buckle closed briefly, dog chose to put their nose back in afterwards.” Tomorrow, you know where to start.
Pawing, rubbing or moving away are reasons to interrupt the exercise and check the fit and difficulty. Return to an easier step. Seek veterinary advice if the skin remains irritated or your dog is very worried. Dogs Trust addresses these problems in its guide.
Do not wait until your dog gives up from exhaustion. Avoid punishing their attempts to escape. AVSAB recommends reward-based training and rejects physical or psychological punishment.
Before the next session, identify what changed: the click, a strap touching the head, or leaving the room? Write it down. “Doesn't like the muzzle” gives you much less to work with than “Pulls away when I lift the strap.”
If there is a bite risk, get professional help with choosing equipment, managing safety and training. Materials and fastenings need to suit the purpose. A training basket that allows food through also cannot be relied on to prevent scavenging poisoned bait. FOUR PAWS explains these differences in its German guidance.
Avoid very frightening situations while your dog is learning to wear the muzzle. Cornell warns that these may worsen fear. You need a separate plan for difficult encounters with dogs on walks. If treatment is needed before your dog is ready, discuss the plan with your veterinary team. You can also prepare for handling and examinations through cooperative care.
Do not leave your dog unattended while wearing a muzzle. Cornell also warns against this.
Perhaps today's session ends after a brief sniff of the basket. You put it away, knowing where to begin tomorrow. The buckle can wait.