In the late 2000s, slaughterhouses throughout the Amazon entered into a number of agreements aimed at reducing the environmental impact of the local cattle sector. In this study, we analyze the effects of these agreements using a new dataset showing the location of bovine vaccination in 2014. Overall, we estimate that more than half of Novo Progresso`s cattle herds have been vaccinated in Ranchland, either in protected areas since the agreements were put in place, subject to an official embargo for violation of environmental or labor laws, or not registered in the Pará Rural Environmental Registry. The results indicate that hundreds of thousands of cattle continue to graze in areas southwest of Pará that, under the terms of recent cattle agreements, are expected to be excluded from the supply chain at an important Amazon cattle border. Our findings underscore the importance of developing new systems for monitoring cattle supply chains in remote areas of the Amazon. The MPF TAC agreements focus on preventing illegal deforestation within the meaning of Brazil`s forest law, which sets minimum reserves on land that must remain forested. The G4 agreement goes beyond legality and prohibits all deforestation, even if it falls within the legal limit. The dominance of the cattle sector in the Amazon, especially in its more remote regions, requires more intensive and accurate monitoring systems and, possibly, new financial instruments capable of further weighting incentives for land grubbing up (Barreto and Gibbs 2015); Cohn et al. 2014; Nepstad et al. 2009). Apart from GPS tracking, these tools may exist.