If someone is allergic to shellfish and their bird is eaten by someone who has eaten shellfish, could they have an allergic reaction? Also, if a person with an allergy is bitten by a cat or donkey that has eaten something they are allergic to, does that cause an allergic reaction?

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If someone is allergic to shellfish and their bird is eaten by someone who has eaten shellfish, could they have an allergic reaction? Also, if a person with an allergy is bitten by a cat or donkey that has eaten something they are allergic to, does that cause an allergic reaction?

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