I need to ask few more questions before answering your query. Early consultations can prevent complications. Kindly contact me on whatsapp chat  (84960595 six five) Dr Faisal Zoheb MBBS , MD PAEDIATRICS , PGPN (BOSTON), FELLOWSHIP IN NEONATOLOGY ( Newborn and vaccination specialist )

Cow milk is recommended only after 1 year of age. Till then, only breastfeeding or formula feeding should be continued.

Cow's milk is recommended as the main milk only after completion of 12 months of age. There is no need to dilute cow's milk, as dilution reduces its nutritional value. A small amount given before 12 months is unlikely to cause kidney stress in an otherwise healthy infant, but I would advise waiting until the baby completes 12 months before making the transition. Continue breastfeeding or infant formula until then. After 12 months, introduce undiluted pasteurized cow's milk gradually, limiting total intake to about 400–500 mL/day while ensuring a balanced complementary diet rich in iron-containing foods.

No need to dilute cow’s milk once it is started after 12 months. Dilution reduces calories and nutrients. After 12 months, whole cow’s milk can be given (usually around 300–500 ml/day, depending on diet and breastfeeding). Avoid replacing breast milk/formula feeds completely before 12 months, as cow’s milk is low in iron and can increase risk of iron deficiency if used as the main milk source. Cow’s milk does not normally “stress the kidneys” in a healthy child when given in appropriate amounts. Problems are more likely with excessive intake. Continue a balanced diet with iron-rich foods (dal, meat/egg if non-vegetarian, greens, fortified foods, etc.).

Greetings Introducing whole cow's milk as a primary drink before 12 months is not recommended by pediatric guidelines. The high protein and mineral content in cow's milk can stress your baby's immature kidneys. It can also cause intestinal irritation, increasing the risk of iron-deficiency anemia. Diluting the milk does not make it safe, as it alters the proper balance of fluids and nutrients. Please stop this current transition plan and continue with breast milk or infant formula.

At 12 months, switch to undiluted whole cow’s milk…. there is no need to dilute it. Keep total milk intake around 400–500 mL/day (avoid >700 mL/day) and continue a balanced diet. Monitor for any signs of milk allergy, but otherwise your transition plan is appropriate.

Cow milk

Give cow milk only after 12 months of age. Give it undiluted.

After one year you can give undiluted cow milk no problem.But keep it once or maximum twice a day if baby also on breast feeding as it will reduce hunger for other food items.

You can continue , monitor signs of milk allergy like constipation, blood in stools , rashes ...

You are doing wonderful planning about this cows milk introduction. I appreciate your awareness about this systemic efforts.

what you did  is superb transition Now You can give undiluted It will not cause any effect on kidney