First of all, let me offer my condolences. Thats just an AWFUL story and as dog owner, I couldnt possibly imagine going through what you did. Ironically, in Julys edition of CO's on-board magazine Larry writes about how wonderful CO is to travelling pets. It can be found here

I would cut and paste that URL onto any email that you send to CO corporate. If you really feel that this could have been avoided and wasnt a tragic accident, I would get the local press involved.