Sacrificing an animal suffering from itching
If an animal suffers from itchiness, then it will be seen whether it is restricted to the skin only or it has started affecting the flesh of the animal as well. If it is restricted to the skin, then sacrifice of such an animal is permissible as itchiness of the skin does not affect the meat of the animal. If the animal has become weak because of it, then it will be taken as a sign that the itchiness has affected the flesh as well. Thus, sacrifice of such an animal is not correct. As mentioned in Durre Mukhtaar:
(Durre Mukhtaar, Vol. 5, Pg. No. 227)
It is also given in Radd Ul Muhtaar:
(Radd Ul Muhtaar, Vol. 5, Pg. No. 227)