You can defrost them in hot water in the sink if you plan to cook them right away. If not, defrost them in the refrigerator over night.
You definitely should not refreeze meat. once the temp drops any bacteria in the package begins to multiply. Cook it within 24 to 48 hours and that is only if it was defrosted in the refrigerator. If you defrosted it at room temp you have to cook it right away or throw it out.
All meat can be defrosted and then refrozen. It is safe to eat, but will not be as tasty and juicy if meat had not been frozen. This is not a safety issue but a culinary one.
In order to tell when frozen shrimp are bad, you will have to defrost them in the refrigerator. Once they are defrosted, open the package and smell them. They should have a light sea smell. They should not have an ammonia type smell.
limp shrimp temp (like temperature) wimp
Cooked shrimp can be left out at room temperature for no more than two hours. After the two hours has passed, you either need to refrigerate the shrimp or throw it away. Shrimp left out on ice will last much longer.
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Defrosted was created in 1970-06.
Chicken should be defrosted under refridgeration and once defrosted removed only to prepare for cooking.
Defrosted turkey is good for about one or two days after the sell by date on the package. You should cook turkey within a couple of days of it being defrosted.
A wood frog can be frozen and then defrosted, and live, if done properly.
It's never advisable to re-freeze raw meat once it has been defrosted especially sea food - the worse kind of food poisoning is from sea food. Shop bought shrimp are generally safe to freeze immediatly after purchase, but once defrosted, they are exposed to harmful bacteria which can spoil them, and therefore they cannot be refrozen. Defrosted shrimp should be covered and stored in the fridge, and consumed within two days. -The following is from the UK Food Standards agency - http://www.eatwell.gov.uk/asksam/healthydiet/fiasandshellfishq/#A221177 When you buy prawns from a supermarket or fishmonger, they might have been frozen before, even if they aren't frozen when you buy them. Check the label or ask the person serving you, if you're not sure. You shouldn't freeze prawns that have already been defrosted.
Most cakes, if frozen and defrosted properly, will still taste fine.