What effect did it have on the cows in tuck everlasting?

In "Tuck Everlasting," the cows in the story are impacted by the presence of the Tuck family and their secret of immortality. The cows are described as living in a peaceful, idyllic environment, but they remain unaware of the deeper implications of the Tucks' eternal life. The Tucks' decision to protect their secret and avoid drawing attention to themselves means that the cows continue their lives in a normal fashion, oblivious to the extraordinary circumstances surrounding them. Ultimately, the cows symbolize the natural cycle of life and death that the Tucks have stepped outside of.