Once upon a time, there was a virtual cemetery for TBs and coins. And almost 12 years ago, on March 11th, 2012 user Tommy 53 reported there this coin as missing.
In the meantime, the cemetery itself moved to Internet Archive, where we found the trace of the cow at
http://web.archive.org/web/20131013205430/http://www.der-geocacher.de/virtueller-tbcoin-friedhof/
Thank you for sharing