Tell me what is the reason: milk (reverse) when drying turns into a slug, regardless of the time of year. Maybe this disease is a cow?
The reasons leading to this fluctuation of milk can be a set: various forms of mastitis, an adhelation of colosure, severe disorders of the digestive system (for example, cirrhosis of the liver), the presence of rotary or mold food in the diet.
Such milk (regardless of caused by the cause) can not be drinking not only in solid, but also in recycled form.
If the reason is in the stern, then it should be changed to better: no hay with mold or fallen rooted roots! If the cow has mastitis, it is better to provide treatment with a specialist, because for this you need to analyze many other additional features and symptoms.
In addition, if an animal once had open wounds of the nipples or the udder itself, putrid microorganisms could penetrate. And even with "healing", milk will still have a long time with mucus - the manifestation of the hidden flow of inflammation.
In any case, it is better to contact a specialist at the place of residence.