Our Border Collie is about 14, we've had her for 11 years, since before the kids were born. In the summer she had got arthritis and has been on medication, however all weekend she has been very unsteady on her feet, and her back end keeps collapsing. She is away to the vets now with DH and DS1. I have been in floods of tears all day everytime i look at her, as i know we are going to have make the decision to end her suffering, however worried that the vet may do it tonight. How do i tell the kids when i'm getting into such a state myself. She has been a great dog, and we have had some great fun with her,as she loved long wlaks, but since the summer she has only been allowed three 10 minute walks a day. Also does anyone have a rough estimate of the cost involved with putting a dog down? I feel pathetic getting myself into such a state.