Raisin

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  Toxic
  Raisins and grapes can cause kidney damage in dogs and should be avoided.
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  Avoid
  Raisins are not recommended for cats.
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  Avoid
  Too sugary and sticky; avoid feeding raisins to rabbits.
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  Avoid
  Avoid raisins for parrots due to concentrated sugar and uncertain safety risk.
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Raisins are dried grapes, which means they keep the same serious safety concern for dogs and become even more concentrated in sugar as water is removed.

For dogs, raisins should be treated the same way as grapes: unsafe and potentially dangerous even in small amounts. For other pets, they are still a poor choice because they are sticky, sugary, and not necessary as a treat.

Choose a safer fresh food instead of raisins, especially if the food may be shared across different pets.

Sources

• ASPCA: Grapes and Raisins