On Monday our beloved family dog is going to visit the vet for the last time. I plan to pick up my 2 (nearly 3) year old twins from nursery a bit early so that I can field any questions before my DH gets home (he's technically his dog and he's devastated). I know they will ask where the dog is as they often hug him when they get home and I plan to just say "he's not here anymore/he's gone" as they are only young and don't tend to ask too many questions but if they then ask "gone where", what do I say? My mum's dog recently passed and she told them he'd gone on holiday and they fairly quickly forgot about him but that was a dog they only saw once a week. What would you say?