Voila ce que dit le site officiel de CBP.
Dans la pratique, je suis d'accord avec Cendryon. Les douaniers ne parlent souvent que l'anglais, ils ne comprennent pas ce qu'il y a écrit sur les produits, alors dans le doute, ils ne se prennent pas la tête et confisquent tout.
Many fruits and vegetables are either prohibited from entering the United
States or require an import permit (for commercial importers) or a phytosanitary certificate from the country of origin. Every fruit or vegetable must be declared to a CBP Officer and must be presented for inspection - no matter how free of pests it appears to be.
Failure to declare food products can result in a $10,000 fine. See special guidelines for produce from
Canada below.
Meats, livestock, poultry, and their products are either prohibited or restricted from entering the United
States, depending on the animal disease condition in the country of origin. Fresh meat is generally prohibited from most countries. Canned, cured, or dried meat is severely restricted from some countries. See special guidelines for animal products from
Canada below, and our Q&A on meat, poultry and swine products for a more complete discussion of food items from those sources.
Bakery items, candy, chocolate, and cured
cheese are generally admissible. Canned goods and goods in vacuum packed jars (other than those containing meat or poultry products)are also generally admissible if being imported for personal use.
Dairy items such as milk, yogurt, butter are generally admissible, although this is subject to change, depending on disease outbreaks. Eggs may be admissible, although frequent outbreaks of Exotic Newcastles Disease and avian flu make it very likely that they will be denied entry. Hard cured
cheese such as parmesan or cheddar are generally admissible, soft cheeses such as soft curd
cheese and
cheese in water (ricotta, feta, etc.) are not. Brie
cheese can be admissible if it does not contain meat.
Cooked and raw poultry is permitted from
Canada except from the province of
Saskatchewan. However, to bring poultry products from any province in
Canada into the United
States, you must have proof of the origin of the poultry. For example, proof of origin would be the grocery stores receipt where the product was purchased, or the label on the product indicates the province in which it was packaged