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You would have to find the url link to the picture and contact whoever is hosting that website and ask them to delete it.
Example if the url was http://animaliaz-life.com/data_images/dog/dog1.jpgYou would need to contact the host provider of animaliaz-life.comIf you have the main domain name I can help you look up the contact information.
most of the time you can get contact information from here http://who.is/
If you don't get a response from the website creator, you can always ask the website host provider to request removal and they will then remove it themselves or get in contacts with whoever runs the website.
Checking in to see if you still need help with this issue, if so please reply at your convenience.