Stopped in a pet store to buy doggy toothpaste and a new six foot leash

Came out with two each duck and chicken feet, lamb and pig ears (each dog liked a different body part more, so that's nice and even), and also a bag of Himalayan dog chews. And a new 6 foot leash.

Forgot the toothpaste.

The bag for the Himalayan dog chews says the ingredient list includes cow milk, yak milk, lime juice, and salt. It then continues "no chemicals or preservatives". Excuse me, exactly what do you guys think "salt" is if not a chemical and a preservative? Not to mention that lime juice.

The dogs are intensely interested in having it, but not in chewing it. Dogs are very strange animals, and I'm still weirded out by the fact that they don't purr.

Ugh.

Does anybody know how to correctly attach the breathing tube to the oxygen tank? They showed us how to open the valve and all that, but I guess they thought this step was foolproof. They were wrong.

If you guys can't help I'll ask google, and if google can't help I guess I can pester my neighbor, who's a nurse, but I hope it doesn't come to that. We're not best friends.

Edit: Got it now, thanks everybody :)