Meg did you ever tell the Police?   You left your dog in the care of these kennels and they did niot honiur that comtract, Sirry for sounding so calous but that is the case for Police.  A lawyer might help.these kennels need tp be closed downinless they can give irrivocable( spelling is bad) proof that your Wee Man harmed himself now I know greyhounds before I came here My Dad used to take me to watch them such a beautiful rather like Horses when runing.

Meg you take every step you can even papers the kennels will not like that. Be sure you tell of their offer to give you another dog as if that would solve it. 

Hugs

Selkie.