I have to agree with the thought that emails really are too impersonal, even if you normally correspond with the person who has suffered the loss, in this manner. To me - that's like sending an ecard for Christmas - which is a no-no in my book - no matter how you normally keep in contact with that person. I don't think anyone would send an ecard or email to a person that just lost a friend or relative, so why would anyone do that for a person's pet-kid??

To post a comment in a forum such as we all do here, is totally acceptable to me tho. Afterall - we wouldn't know each other if it wasn't for our pets, yet in most cases we don't even know one another's real/complete names - let alone their address.