We have just got a new horse, she's a 14.1 welsh section d mare.

We travelled her 49miles today. She hasn't had a poo since 10am and it is now 6pm. I obviously know it's not normal, but I was thinking it could be because she's just stressed?

She never got fed breakfast so it could also be that.
Don't say get a vet, because if she doesn't poo soon we obviously will! But just let me know if you know wether this is normal when their stressed or whatever, thanks!