“I got size one for my mixed Jack Russell, she’s 8 kg. I find this so much kinder muzzle, dog can pant stick there Tung out eat a treat
Fitting: you can actually fit it to your dog face by putting it into warm water and then moulding it to the right position around their face, then placing it back into cold water to set it, the only thing I’m not hundred percent keen on it has a buckle type of strap I’ve only had it a few days so I think it’s just a matter of getting used to it. I should imagine if the muscle was a bigger size it might have a clip, you’ll need to check with the manufacturers?”