I swear that I have a new fear unlocked at least once a month as a pet owner. There are a lot of things to look out for with our furry friends, whether it's a cat or a dog (or whatever you have.)

It's like the time I bought my wife her favorite Stargazer Lilies for Mother's Day, and the cat ended up eating them. We didn't think much of it until we found out that it was highly toxic to cats. (And this was on a Sunday when we had to bring her to the emergency room. After a thousand dollar bill and a couple of days later she was just fine.)

Common items at Minnesotacookouts can make your dog ill. 

Did you know that when you finish your T-bone steak, you shouldn't give it to your dog? Lots of people don't know that. Once the bone is cooked it becomes more brittle, and your dog could harm themselves with sharp bone fragments and chunks that could cause blockages.

Don't ever give your dog corn cobs.

Corn. Soft focus
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I found this out yesterday from a friend who had a situation where they had to bring their dog to the vet. Someone had thrown them a whole corn cob, and the dog chowed it down really quickly.

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The problem is corn cobs can be indigestible and can cause choking, or become stuck in the dog's digestive tract. It Can Even Be Fatal.

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Don't ever feed anyone else's dog any food scraps. Period.

You may be thinking you're being nice to the dog, but there are so many reasons why you shouldn't feed table scraps to someone else's dog. They may have sensitive stomachs, allergies, or medical issues you don't know about.

My brother-in-law, trying to get my dog's affection, fed him table scraps and Thanksgiving. That led to a week of doggy diarrhea. Trust me, don't feed anyone else's dog food scraps. Please!

LOOK: Here Are 30 Foods That Are Poisonous to Dogs

To prepare yourself for a potential incident, always keep your vet's phone number handy, along with an after-hours clinic you can call in an emergency. The ASPCA Animal Poison Control Center also has a hotline you can call at (888) 426-4435 for advice.

Even with all of these resources, however, the best cure for food poisoning is preventing it in the first place. To give you an idea of what human foods can be dangerous, Stacker has put together a slideshow of 30 common foods to avoid. Take a look to see if there are any that surprise you.

Gallery Credit: Rachel Cavanaugh

RANKED: Here Are the 63 Smartest Dog Breeds

Does your loyal pup's breed make the list? Read on to see if you'll be bragging to the neighbors about your dog's intellectual prowess the next time you take your fur baby out for a walk. Don't worry: Even if your dog's breed doesn't land on the list, that doesn't mean he's not a good boy--some traits simply can't be measured.

Gallery Credit: Sabienna Bowman

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