Milk from cows that have recently been given antibiotics (within the withdrawal period) cannot enter the food chain. This milk is either fed to calves or added to muck or slurry. This is not very good for livestock or ecosystem health. Feeding calves milk containing antibiotics can help select for antibiotic resistance in the calves, and spreading muck or slurry containing antibiotics can select for resistance in the wider environment. There is interest in forming a group to will consider innovative ways of addressing this problem.
If you have expertise on the subject or know of more people/other groups that could be interested in making this into a RISS group, please get in touch.