Some of the books I read to try to get a sense of animals lives from different angles.
I have been a vegan for 8 years and have been semi-actively involved in animal rights for the past 5 years. Despite this, I have realized that my understanding of many aspects of animals' lives is surprisingly narrow, and I think this is fairly common for activists in animal advocacy (or any movement, really). As the project I am now working on is recommending charities that should be founded in the animal advocacy movement and providing an incubation camp for them, I feel the need to broaden my understanding of these issues.
Why a broad understanding matters
There are a few reasons as to why getting a broad understanding can increase long term impact.
The first is to get a truer and less biased sense of the world. Animal advocacy activists have an incentive to show the worst of the worst that goes on in factory farms. Likewise, the industry has an incentive to show only the best living conditions. But ideally, you want to have a good sense of the true state and variability of the conditions. For example, some of the most graphic scenes in a video are focused on pigs and cows, but the day to day life is far worse for a chicken, even if it does not yield as emotionally salient a clip. This is often easy to see if you visit a farm but less clear in much of the anti-factory farming content.
The second major benefit is that broad research provides distinct information on different, and often more focused, domains (e.g. animal behaviour under stress). For example, a few books I read were on how animals grieve, which changed some of my views about how to mitigate psychological distress in a farm setting. This sort of information is hard to get from more standardized anti-factory farming sources.
The third major benefit is due to the synergistic benefits of cross-domain knowledge. For example, an activist book might tell me that corporate outreach has been effective in the past, while another book, written by someone in husbandry, lets me find out about the detailed conditions of how chickens live on a farm and what behaviours they exhibit when given a choice between two toys. Together, these books might give me an interesting idea for what might be a good future lobbying technique.
How to get a broad understanding
1) Reading diverse sources
For example, one might break down the content produced in animal rights into three distinctive groups.
2) Seeing the full supply chain - directly
Another way to get a broad understanding of the matter is to witness firsthand or familiarise oneself with each step of the process. When I worked in poverty, I was one of the few people who talked to every employee at every level of an organization. This often yielded different results: for example, we worked with a company where I talked to the CEO, manager, field manager, head surveyor, and standard surveyor, and as I got closer to where the work was being done I got more and more accurate (and often negative) information.
In the context of animal rights, a way to get a more wholesome picture can be from visiting a farm, or preferably a few farms at least. Ideally, by witnessing each step of the work done in multiple farms you can start to get more of a sense of what really happens there, contrary to the comparatively selected images that are published in the content arguing for or against animal welfare. For example, on the highest standard farms (e.g. AWA or GAP level 5+), how do they compare to farm sanctuary? Is it just the fact that animals are slaughtered or are there noticeable day to day differences in quality of life as well?
Visiting multiple farms is something that relatively few people do as it comes with a fairly high time cost, but I also think it provides a different angle on what is currently neglected in the animal movement. For example, it gives a much stronger intuitive sense of rates and severity of different issues, something that can be very hard to find in academic research.
Overall we feel getting a broader understanding is worth the time it takes to increase the accuracy of our world models and turn up new ideas that might be currently neglected in the animal movement. The ways listed above are just a few of many ways to get a broader understanding. Other ways include speaking to a wide range of people both within (like our animal experts survey) and outside of the animal advocacy movement, or working directly in any related field.