Can pets get or spread Ebola?

Focusing on the cases of two dogs can seem trivial compared to the 4,000 people in West Africa who have died from Ebola this year.

But CNN's Anderson Cooper notes that concern about animals can have a broader impact on human health.

"We've seen this in disasters before, people not wanting to leave their homes because they couldn't bring their animals to a shelter," he said.

"The fear among health care workers and CDC officials and others is that if people are afraid that their dogs are going to be killed, they might not come forward if they're starting to show some symptoms."

"At this time, there have been no reports of dogs or cats becoming sick with Ebola or of being able to spread Ebola to people or other animals," the Centers for Disease Control and Prevention says.

Some studies have shown that dogs may experience asymptomatic Ebola infections, the CDC says -- meaning they may have the virus but don't get sick.

Also, the agency says, human infections haven't been linked to dogs.

"The risk activities that lead to human infections are direct contact with infected human body fluids, or through bats or consumption of infected wild meat."

But it's not yet clear whether a pet's body, paws or fur can pick up and spread Ebola to people or other animals.

Biology professor David Sanders said some animals, like fruit bats, can carry the virus without showing any symptoms and could infect others.

"The concept that viruses in animals can be transmitted to humans and can have potential harmful consequences, that's obvious," said Sanders who teaches at Purdue University.

"So infected animals that are not showing signs of infection can potentially be capable of transferring virus to humans."

Do we really need to worry about pets getting Ebola?

Not at all, said Dr. William Schaffner, chair of preventative medicine at Vanderbilt University.

"It is not a danger. We're not concerned," Schaffner told CNN's State of the Union with Candy Crowley.

"We know that this virus can circulate in animals, but pets have not been a feature of Ebola spread, whether in Africa and certainly not here in the developed world," he said.

"We all thought that the attention in Spain to the dog of the person who was ill was ill-advised and was a distraction."

So why did the dog in Spain have to die?

More than 400,000 people signed an online petition asking Spanish authorities to spare the life of Excalibur, the dog of nursing aide Teresa Romero Ramos. Romero is in critical condition after helping treat an infected Spanish missionary.

But Madrid health authorities insisted they had to euthanize Excalibur in case the canine had Ebola.

Critics said the dog should have been quarantined, just like Romero's husband has been.

What about the nurse's dog in Texas?

Bentley, the dog belonging to infected Texas nurse Nina Pham, is now safe with Dallas Animal Services and Adoption Center and was "on his way to an undisclosed location," the agency said Monday on Facebook.

That post was "liked" more than 1,800 times.