Only Thing I could suggest is to report them to their hosting provider to have them shutdown.  From the whois, it appears to be OVH located in France.  You could try emailing abuse@ovh.com and report their site.  This information was obtained from betterwhois.com at the following link.

http://www.betterwhois.com/bwhois.cgi?domain=golden-cows.com&x=0&y=0

Domain Name: golden-cows.com
Registry Domain ID:
Registrar WHOIS Server: whois.ovh.com
Registrar URL: http://www.ovh.com
Updated Date: 2014-05-29T13:23:06.0Z
Creation Date: 2014-05-29T13:17:11.0Z
Registrar Registration Expiration Date: 2015-05-29T13:17:11.0Z
Registrar: OVH, SAS
Registrar IANA ID: 433
Registrar Abuse Contact Email: abuse@ovh.net
Registrar Abuse Contact Phone: +33.899498765
Domain Status: clientTransferProhibited
Domain Status: clientDeleteProhibited
Registry Registrant ID:
Registrant Name: SMAOUI AMINE
Registrant Organization:
Registrant Street: Residence DALIA h9
Registrant City: Ariana
Registrant State/Province:
Registrant Postal Code: 2080
Registrant Country:  TN
Registrant Phone: +216.98995895
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: amine_smaoui@yahoo.fr
Registry Admin ID:
Admin Name: SMAOUI AMINE
Admin Organization:
Admin Street: Residence DALIA h9
Admin City: Ariana
Admin State/Province:
Admin Postal Code: 2080
Admin Country:  TN
Admin Phone: +216.98995895
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: amine_smaoui@yahoo.fr
Registry Tech ID:
Tech Name: SMAOUI AMINE
Tech Organization:
Tech Street: Residence DALIA h9
Tech City: Ariana
Tech State/Province:
Tech Postal Code: 2080
Tech Country:  TN
Tech Phone: +216.98995895
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: amine_smaoui@yahoo.fr
Name Server: dns108.ovh.net
Name Server: ns108.ovh.net
DNSSEC: signedDelegation
URL of the ICANN WHOIS Data Problem Reporting System:
http://wdprs.internic.net/
 Last update of WHOIS database: 2014-08-26T12:14:38.0Z