Fly Eggs inside horses nostrils

[Gingerlee]

Hi everyone!
The last couple of days I have been finding what look like fly eggs inside my horses noses! All 4 horses affected. Noticed by chance when I found some eggs on the nose part of one of their fly masks and decided to check them all and to my horror found eggs around the entrance to their noses and right up inside. Some had even hatched. Wiped out their nostrils with water and cotton wool...eggs came out easily...but within hours more had been laid. Now cleaning their noses out twice daily and finding eggs each time. Haven't seen what is laying the eggs and don't even have many flies around. Pretty sure not bot flies as we deal with those every year and I know what they and their eggs look like.
Will try to add a photo. Rang vets and was advised to use fly spray...hasn't made a difference. Never had this or known this before...anyone got any ideas??!

 

[TheMule]

deleted

 

[Goldenstar]

I have never seen that. Do you have any pictures of the hatched ones ?

 

[Mrs. Jingle]

I have never seen this either - OP which country are you in - I do know that in other parts of the world a type of Bot fly lays its eggs directly inside the nostril rather than on the legs and body of the horse. Although I have to say those do not look like any Bot fly egg I have ever seen - and I cant imagine a bot fly ever managing to get inside a horse's nostril to lay its eggs. Fascinated to see if anyone else knows what they are.

 

[The Fuzzy Furry]

Are you definitely sure they are eggs?
I've been wiping off almost identical, but these are seeds from fine grasses from the over night paddock. Look just like fly eggs on face, nostrils etc.
Can you take samples and magnify?

Edit, when you say hatched, do you mean larvae coming out?

 

[Gloi]

They look rather like grass seeds in the pictures, have you taken some to the vet to look at under the microscope

 

[Pearlsasinger]

Unless you have actually seen the larvae, I would think that those were grass seeds.

 

[irishdraft]

What is your grazing like OP are you in the UK? It looks very like seeds from flowering grass to me . I have loads of this in my fields atm

 

[cobgoblin]

Yorkshire fog grass seeds?