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Pigs ears have been subject to several recalls in the last few years due to
salmonella contamination. This is basically not an issue for the dogs, but
can be an issue for people handling them (in particular children, elderly
and immune compromised). People should be aware when handling any dog
treats that basic food handling hygiene practices (wash your hands!) needs
to be carried out.
Personally I consider treats like pigs ears to be a much better option than
things like rawhides, but no where near as good or healthful as a nice juicy
raw bone from the butcher.
Cat
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