This aspect of Veterinary Public Helath deals with a number of ethical issues. Welfare of animals is an ever present issue regardless of the setting, whether it concerns pet animals, production animals or wild animals.
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Where the line that defines acceptable & unacceptable welfare conditions lies is different for different individuals from different countries & cultures, however, it is common for minimum welfare standards to be defined in legislation (see [[Legislation-Wikivet|Legislation]]).