Kat,

They may be more sensitive to electromagnetic changes than humans. Dogs can sense impending epileptic seizures in humans and possible changes in the heart due to electrical changes.

Sue,

From what I've seen on the news, the most damage was on the beaches, and so the only animals likely to be affected would be those in those areas. The infrastructure further inland hasn't been affected nearly as badly as right on the shore. I'm sure in the cases of the islands that were overcome, the animals died along with the people.