I would try and clean it out first with some antiseptic or a antiseptic towelette and then put the polysporin on it and wrap it. She'll probably chew that off but just keep it as clean as you can. Call your Vet in the morning and ask them about it to be on the safe side.
Yes you can. As Rooster as said, you need to clean the area well, soap and water, or a mixture of peroxide and water....always rinse the area well with water, then apply the antibiotic ointment and cover it....you will probably have to reapply the bandage, but clean the area a couple times a day and call your vet, infection can easily become serious.
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