Hi James...sorry to hear about Topsy, I know how hard it is when a pet falls ill...its a year this month that we lost our own dog, Jack, after a three month fight and many, many visits to the vet..his death was a real shock and both my wife and I missed him terribly...vowing never to have another dog because we felt so miserable...a month later we brought a rescue dog and two months after that a second rescue dog...neither could replace the one's we lost, but like all animals they are their own characters and we love them just the same...and wouldn't want to be parted from either of them. I hope things work out better for you and my thoughts and best wishes are with you and Topsy...good luck my friend.
Regards
John