What items does animal farm need that they cannot produce in the book animal farm?

In "Animal Farm," the animals face a shortage of various items they cannot produce on their own, including certain tools, materials for building and maintenance, and food supplies that are beyond their agricultural capabilities. They rely on trade with nearby human farms to obtain these essential goods, such as iron for plows and grain to supplement their diet. Additionally, they lack items like medicine and proper clothing, which further complicates their efforts to sustain the farm. Ultimately, their inability to produce these items highlights the limitations of their self-sufficient ideals.