Halo admits to adding garlic powder to both their cat and dog canned food. On their website's FAQ they try to claim that this is okay, and try to say that garlic in small enough amounts does no damage to pets. 

This is false! The ASPCA states that garlic in small amounts, especially concentrated garlic like garlic powder (which is listed in the ingredients list), can be highly toxic to both dogs and cats.

Personally, I became concerned when both of my cats started to throw up more frequently, and gag when picked up following their feeding time.

These companies can make a perfectly good product without adding this toxic ingredient.

Halo is backed by Ellen DeGeneres, and I think that if she were aware that a product she cares about could potentially kill an animal, she would be instrumental in changing the company's mind about the ingredients included.

I urge you to please consider signing this petition so that we can get a great product out there that will help to support the health of all our furry companions!

Resources: 

Foods Hazardous to Dogs

Foods Hazardous to Cats

Halo Pets FAQ