One of the best parts of owning a dog is sitting on the couch with them and sharing a snack, but while everyone knows not to feed their dog chocolate, there's a surprisingly long list of other foods your pet should avoid. A good owner will always check online if something is safe for their dog to snack on, but sometimes this doesn't occur to us until after we've shared it. Don't make that mistake!

We've collected 7 foods that your dog should not eat under any circumstances. While some are obvious, others can seem completely random.

Learn this list from top to bottom so you never feed these to your dog again!

1. Xylitol (sugar-free gum and other treats)

We've shared stories in the past about dog owners who had scary experiences after their pet swallowed some of their sugar-free gum. Xylitol, one of the most common sweeteners in gum and other candies, is deadly to dogs. If you notice coordination problems and lethargy after they eat some, get them to the vet.

2. Popcorn

Regular popcorn is normally a fine snack for dogs, but they shouldn't have any of the buttered or flavored kind. Salty foods in general are dangerous, because dogs can get dehydrated quickly. Corn kernels can also stick in their teeth and cause nasty oral health issues.  

3. Macadamia nuts

People mainly enjoy these nuts in chocolate, so they wouldn't share with their pooch anyways, but they're just as dangerous on their own. While most dogs won't die from Macadamia nut poisoning, they can suffer from fits, weakness and high fevers.

Click the next page for 4 more foods your dog should avoid!

4. Avocado

This is a tricky one, because only certain parts of the avocado are a risk to dogs. The skin of the avocado contains a chemical called persin, which is harmless to humans but deadly to dogs. The avocado plant is also full of persin, so if you grow your own avocados keep them out of reach for your four-legged friends. Strangely, the inside of the avocado is persin-free, so if you feel like sharing a bite with your pooch go right ahead.

5. Grapes

They might seem harmless, but dogs should avoid grapes and raisins at all cost. These fruits can cause kidney failure and even death for your pet. Be careful about any spilled grape juice too, because it can be even deadlier.

6. Caffeine

It may seem like a no-brainer that your dog shouldn't share your cappuccino, but some people need to be reminded. Caffeine is just too much for our pets, causing diarrhea, muscle spasms and a dangerously elevated heart rate. Rush them to the vet ASAP if you notice they've had any.

7. Garlic and Onions

Both these vegetables are from the same family of "allium" plants, and should not be shared with your pets. A few tasty onion rings can leave your dog with organ damage and breathing problems, so it's not worth it!

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