Cat worms cannot be completely eliminated with home remedies or 100 percent natural products such as herbs, garlic, and pumpkin, although these natural products can help. In many cases, however, these products just are not powerful enough to kill resistant worm infections such as heartworm, hookworm, and tapeworm. If your cat is experiencing any of the symptoms below, he might have a worm infection. He should be taken to the vet immediately for testing.