Animal welfare and other ethical implications of Precision Livestock Farming technology

In this commentary, we explore the risks and challenges associated with Precision Livestock Farming technologies based on an online workshop with over 70 international animal welfare experts, policy-makers, NGO, students, farmers and industry staff.

The term Precision Livestock Farming (PLF) is generally associated with technologies that allow the real-time, automated and continuous monitoring of farmed animals (Berckmans 2017), such as cameras, sensors, and sound devices, which are increasingly powered by artificial intelligence and allow the collection and interpretation of data. They are seen as one of the promising solutions to sustainable livestock farming, helping farmers to improve productivity, whilst limiting environmental degradation, sustaining livelihoods and improving animal health and welfare. Whilst there has been considerable attention placed on the opportunities offered by PLF technologies, relatively less scholarly interest has been afforded to its risks (Werkheiser 2020).
Our efforts described below were inspired by a small number of research papers exploring the ethical implications of PLF (e.g., Bos et al. 2018;Werkheiser 2018Werkheiser , 2020, as well as research into the social and more-than-human consequences of robotic milking technologies (Bear and Holloway 2019;Hansen 2020;Vik et al. 2019). In order to identify the benefits and challenges of PLF in relation to animal welfare (and beyond) and how to address them, a major one-day online workshop gathering over 70 international animal welfare experts, policy-makers, NGO, students, farmers and industry staff was held in November 2020. A series of presentations and activities allowed the participants to discuss current developments in PLF for several species, their potential benefits to welfare, as well as the challenges and potential solutions. In this commentary, we focus specifically on the potential challenges and risks of PLF raised in this workshop and highlight areas for further research. These are summarized in Fig. 1 and discussed below.

Technical limitations of PLF technologies
In terms of technical limitations, the validation of PLF technologies was one of the main issues identified during the workshop. Technology validation is required to demonstrate that a system can meet its targets under realistic operating conditions. In the case of livestock farming where many variables must be taken into account, this means that the technology should be validated in different environments and conditions. Issues such as weather or location of animals may make data collection difficult (especially in extensive systems), as can internet access in rural locations. More generally, there are issues such as limited battery life or the structure of buildings which may not always be suited to the use of PLF technologies

Challenges for farmers
In the workshop, participants were concerned that many PLF technologies required significant investment from farmers, specialist knowledge and skills to operate or interpret data, advisory support (e.g., from veterinarians), and suitable farm infrastructure (e.g., broadband connectivity). Initial research has suggested that robotic milking technologies have tended to favour larger farms with the capacity both to invest (Yang et al. 2021) and access support. Studies focusing on adoption of general smart farming technologies acknowledge the importance of the factors raised above (Fielke et al. 2020;Klerkx et al. 2019), as well as trust which workshop participants also raised. Lack of farmer or advisor trust in the technologies may be linked to a lack of validation as well as information relating to cost-effectiveness. It may also relate to questions surrounding data ownership and how the data is used, stored and who is able to access it (Wiseman et al. 2019). This may in turn cause feelings of vulnerability, especially where cameras are working continuously. As large amounts of data are often stored on 'clouds' , there are also concerns surrounding cyber security.
Workshop participants also raised questions about potential impacts on farmers' mental health linked to productivity and pressure to keep up with key performance indicators. Some farmers may not feel comfortable with the use of new technologies that may be difficult to understand and that require different sets of skills (Barrett and Rose 2020). Furthermore, there is the chance that PLF decreases animal keepers' contact with their animals, which could lead to negative welfare outcomes (see below), and reduced stockmanship skills (Butler and Holloway 2016;Werkheiser 2018). It was questioned whether PLF may also have an impact on farmers' autonomy, making them more dependent on external devices.
Technologies could change what it means to be a farmer and make the job less attractive to some (Rose et al. 2018), though we acknowledge they could attract new workers to the industry.

Animal welfare challenges
Workshop participants emphasised the variability in production systems in terms of species, genetic variability and rearing environments, as well as individual variability in behaviours such as feeding or drinking. For this reason, devices that are not 'wearer-driven' or re-purposed for different species may not always be suitable; hence there is a potential that devices could cause physical injuries (e.g., due to the weight of a wearable sensor) or have impacts on animal behaviour (e.g., social behaviour), especially if a single animal is wearing multiple devices.
There are also concerns that the implementation of PLF could change farm management to fit the use of technology rather than to improve welfare. For example, cameras may need longer and brighter light hours to work efficiently, or rearing environments may be made more barren to reduce obstacles or background noises for cameras. Experts in the workshop pointed out that most PLF technologies appear to focus on productivity and health parameters and that while health is integral to welfare, other aspects (e.g., positive animal welfare) should also be taken into account. We also discussed whether the implementation of PLF would result in farmers spending less time with their animals, which could have an impact on the human-animal relationship and perhaps even changing human attitudes towards animals (Butler and Holloway 2016;Bear and Holloway 2019). This is in turn may lead to more ethical challenges such as the objectification of animals and further intensification, as PLF can help farmers monitor larger numbers of animals (Werkheiser 2018;Miles 2019).

Consumer attitudes
Experts in the workshop argued that consumer acceptance is an important aspect of responsible innovation and successful introduction of technologies (see Siegrist 2020). When it comes to food, consumers are often concerned about 'naturalness' , which is also the case for people's perception of animal welfare (Koyratty et al. 2014;Schuppli et al. 2014). For this reason, workshop participants wondered whether a more digitalized, hightech, and 'faceless' version of farming would be acceptable to the consumer.

Overcoming the challenges
In our workshop, we also discussed how to address the technical, social, welfare, and consumer challenges raised above. Experts raised the following points: • Technologies must be wearer-driven (considering genetic variability, breeds, rearing environment, welfare needs) and co-designed in consultation with multiple stakeholders, including the farmer to improve on-farm relevance and suitability; • More funding/research is needed on technology validation; data integration; the added value of PLF; implications for animal welfare (assessment parameters, positive welfare, benefits of PLF); consumer acceptance; and farmer engagement; • A code of practice is needed, developed in collaboration with farmers on data ownership/storing/ sharing/privacy, to increase transparency and trust; • Technologists need to engage with other stakeholders: consumers, veterinarians, milk buyers, retailers, etc. at an early stage: educate, raise awareness and promote discussion; • Accessible (cost, location, appropriate format) training needs to be provided to farmers to facilitate use of technologies and ensure technical assistance is provided; • Support is needed to enable farmers to adopt technologies, including rural infrastructure, incentives to adopt, and advisory support.
We argue that whilst further efforts are needed to improve the scientific sophistication of PLF technologies, the research community, policy-makers, and funders alike need to place a greater emphasis on the ethical implications of their use. This will require a trans-disciplinary effort and a systems perspective, involving farmers, advisors, researchers and technologists in co-creation, rather than relying on 'technology push' .