Lie or tell the truth to my dd -- thats the question. Please help me.
My husband and I used to do dog rescue, mostly older adult mixed breed dogs with the exception of one mixed breed puppy who was badly injured by a car. We still have four geriatric mixed breed dogs left from our dog rescue days. The puppy is now almost nine years old. The others were rescued when they were adults, but they are at least twelve to fifteen years old, based on vet estimates.
Sadly, the inevitable is starting to happen -- these elderly dogs are starting to get so old that we think it is time to euthanize at least one of them -- my daughters' favorite dog who the vet estimated to be at least fifteen years old (she's a very small dog, and they live longer in general) .
I think there is a second dog who should also be euthanized because she estimated to be 12 years old and has a tumor growing out of her mouth that is the size of a baseball, but my dh disagrees. This dog is my husband's favorite dog, the best dog ever, and I think he just can't bear to let go of her yet. I feel that she is suffering and that it would be kinder to let her go peacefully. She is so old and fragile that surgery is out of the question.
Here is the question: my four year old daughter came up with an idea on her own which sounds like a graceful but dishonest solution -- sending the dogs together to the "old dogs home." That way, she said, her favorite dog would get good care and would be with her very best friend dog so she would not be scared. I am very tempted to go along with this fiction for two reasons: 1) dd would then believe that her favorite dog was still alive; and 2) both dogs could then have some peace from their pain.
However, I have since done some research and I fear that this lie may make things easier at first, her sense of betrayal and horror would make it so that she could never trust me again. Part of my concern is that the dog with the tumor in her mouth will probably be euthanized in a matter of weeks or months (as soon as my dh can get closure in his own mind), so it would be a pretty hard double blow to have two dog deaths that close together.
I admit that I told my daughter that our elderly toy poodle went to the old dogs home soon after she was born (we euthanized the poodle when our dd was about four months old).

: I know this was wrong, but she was only about 25 months old and was asking about the toy poodle in all of her newborn pictures, and I didn't think she could understand so I told her the dog went went to the old dogs home. From time to time after that she mentioned the old dogs home and I told her the poodle was doing fine and was very happy there.

:
My second dd is 25 months old. She is attached to the 15 year old dog, too. The girls adore this old dog, who is gentle and sweet and loves to go on walks with each girl holding one leash.
What do you think? Old dog home for both dogs or having two beloved dogs die within weeks of each other?
Thank you.