Aural hematoma: Pet owners

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Anyone else dealt with this?
https://www.acvs.org/small-animal/aural-hematoma

One of these ears is not like the other
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He’s been to the vet to today. No infection/mites etc. No surprise there. He’s not allowed out. Doesn’t even really pick at it now. But considering it’s so large it’s basically swollen his ear shut.
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Probably surgery time.

I’m betting this stinker is the culprit.
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Considering she starts playing with a tackle then gets pinned and kicks… Probably just an unlucky clobber upside the head.