I am taking responsibility for my decision and I am not blaming anyone else and rest assured this is something which will cause me heartache til the end of my days .
Please don't beat yourself up too much. It is so so sad for all of you that you have had to reach this decision, but it sounds like you have given Daisy a wonderful start in life, excellent socialisation with children, some good basic training and love and cuddles to enable her to be a warm and loving dog. If you were a puppy walker for someone like guide dogs you would have been given 10 out of 10 for what you have done for Daisy. There are a lot of pups out there that do not get such a good start in life, so you should be proud of yourself for what you have achieved. You are also giving Daisy what it sounds like she needs now, access to a knowlegable working home, again there are many people who would have not done that and perhaps ended up with an unhappy dog, she is young enough to adapt to a new home where they will be able to work with her.
I know you will all be heartbroken and miss her like crazy, but I hope you can take some comfort from what you have achived, its scary to think what could have happened to her if she had gone to a different sort of home.
to you and your family and I hope that when you are ready you find the right dog for your family as it sounds like you have so much to give for one lucky dog out there