You have loved Tigger and you have given  a good life for her, Conniekat8. That is what is important, I think. Not that many pets have as  good life as Tigger has. So perhaps, as painfull at is may be, Tiggers life might be nearing the end, but she has had a good life, and thats whats improtant. 11 and more years is a lot for a cat. It is not the years but the mileage. It seems to me that you have cared for the well being of Tigger very much indeed and that is what is important. She has had a good life thanks largely to you. 

-Morbo will now introduce the candidates - Puny Human Number One, Puny Human Number Two, and Morbo's good friend Richard Nixon.
-Life can be hilariously cruel