If a Party for the Animals has already been established in your country, then vote for them. If you really believe that animal welfare is important, then it is necessary to give your personal interests less priority. Take the Dutch situation, for example: the grassroots supporters of our party come from all ranks of the political spectrum, from liberals to socialists. They gladly put their differences with respect to other issues aside to achieve a common goal: a respectful interaction with animals and our living environment.
If there is no animal party in your country, then find out who the most animal-friendly politicians or parties are. One party will have a more animal-friendly profile than the other, but it may also be the case that a real animal protectionist can also be found in a less animal-friendly party. Find out which politicians and parties take a clear stand on animal welfare and give them your vote during elections.