What causes excessive panting?

you know it could just have been part of her failing 16 is pretty old and a great life...I wouldn't ponder about it just be happy you were able to share 16 years of love and companionship...and if your interested at all they make cremation jewelry that you can put some ashes in everything from necklaces to key chains etc. Im not trying to sell or promote a site but I got some nice things from a place called ashes to ashes it's for both human and pet, I choose a human piece