My dog is lethargic and pupil won't dilate after dog collision.

Question

My dog collided with another dog yesterday morning and his tooth came out, he's been acting very lethargic since. Even more today. His eye on the side of where his tooth has come out is not dilating (his pupil) his other side is. There's yellow/brown on and in the hole where his tooth was, think there maybe an infection. But I'm most concerned about him being extremely lethargic and his trauma side pupil not dilating? It is slightly but not as much as the other side. I've shone a light onto them. Pet's info: Dog | Greyhound | Male | unneutered | 7 years and 10 months old

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Poor Beau! The eye not dilating is likely a sign of significant head trauma, which also makes sense if he lost a tooth in the collision - it normally takes quite a bit of force to cause this! It sounds like Beau may have a concussion or other serious head injury, and it also sounds like his tooth socket may be infected - especially if part of the tooth root is still present. These things will need veterinary care right away, so I would recommend taking him to the vet today to be checked. Your vet can do a complete neurologic exam to help determine how serious his head injury is, and will also evaluate his mouth to see if he needs surgery to remove any remaining part of the tooth that may be infected and causing pain.

My dog is lethargic and pupil won't dilate after dog collision.

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