Dog black eye?

Question

My sisters dog seems to have gotten a black eye somehow while we were at school. At first I thought it was allergy related, but when I looked it up on the internet, I found that it's pretty unlikely seeing as it would probably affect both of his eyes and would be itchy. It looks more like he ran into something or hit something. Aside from the outside darkness/redness around his eye, it looks like his pupil has also become reddened. What should we do? Is it serious?

Answer 1

vet

Answer 2

He needs vet attention immediately. It could be serious. he could lose his eye.