Prevention and treatment of freezing injury of dairy cows
Raising dairy cows in cold seasons can easily cause freezing damage to dairy cows. It is common in cold weather to tie the cows outside the enclosure in the cold wind for a long time or to raise and raise cattle in open enclosures. Even in captivity, if the environment is humid and cold, cold wind invades and hungry cattle that are not fed enough, it will cause frostbite to the cattle limbs.
The hazards of frostbite
The hazards of superficial frostbite After the skin is frozen, blood vessels contract strongly, causing tissue ischemia, and the skin turns from pale to blue-purple. After rewarming, the blood vessels are dilated, the skin is congested, the frostbite part is burning, itching, redness, swelling, and heat pain. In severe cases, blisters of varying sizes will be frozen. The blisters will be transparent and painful. After two or three weeks, the blisters will dry up and form dry crusts. When the crusts fall off, new skin will cover the wound. The hazards of deep frostbite The full-thickness skin and subcutaneous tissues are frostbited, and the frostbite is deep to the bones, necrosis and ulceration, blackening and drying, and finally the boundary between the necrotic part and the healthy tissue is separated, and the necrotic part rots and falls off.
Treatment of frostbite
Treatment of superficial frostbite After minor superficial frostbite occurs, do not bake by fire or soak in hot water immediately. It can be applied with white wine and pepper, several times a day. Or massage the skin with camphor alcohol or boric acid alcohol or irradiate ultraviolet rays. If there are blisters on the frostbite site, they can be drained with a sterile needle, and apply a local wet compress with 30% boric acid. After drying, apply 10% sulphuric acid stone grease once a day. When there is an ulcer, apply petroleum jelly or lard, etc., and then wrap it with gauze. 1% iodine solution or camphor ointment, iodine glycerin, etc. can be applied when the frostbite is swollen. The treatment of deep frostbite should take early measures to reduce tissue necrosis and prevent infection. When frostbite occurs, rewarm the frozen part as soon as possible, soak the injured limb in an iron bucket filled with warm water, and heat it to 38-42°C within 5-10 minutes, and raise the frozen part slightly to reduce the edema. Use antibiotics when frostbite is large and deep to prevent infection. When the frostbite is severe, it can be sealed with novcaine to promote the early shedding of necrotic tissue and make the wound heal early. When frostbite is infected, remove the necrotic tissue, disinfect and treat the wound.
Treatment of frozen cattle
When cows are frozen, especially young calves born in the open or poorly insulated cows, they should be quickly brought into the warm room, scrubbed with warm water and massaged as soon as possible to promote blood circulation.
For lactating cows and dry cows, it is best to wear cotton bras for excellent results. When cows go out in winter, they should have appropriate activities to keep warm and promote blood circulation, and they should not stand still for a long time. In order to protect the dairy cows to survive the winter safely, it is necessary to build a thermal cow house, do not raise cattle separately, reduce the heat dissipation of the cow body, feed a balanced and nutritious diet with a full price, increase 10% energy and 5% fat feed, Feed the cows and drink warm water to enhance cold resistance.
The cattle that have suffered freezing injuries should be treated promptly. No matter which method is used for treatment, care must be taken to keep the cow barn and frostbitten areas warm to prevent re-freezing.
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