A method of preparing an antibody suitable for use in a canine is provided. Also provided are caninised antibodies which specifically bind to canine neuronal growth factor (NGF) and neutralise the ability of canine NGF to bind to the p75 or TrkA canine NGF receptor. The invention extends to nucleic acids encoding same and to methods of treating pain and arthritis in a canine using said antibodies and/or nucleic acids.
