I'm a vegetarian anyway, so my answer is no.
Horse slaughter is horrific though.
I wish they'd bring in equine slaughter houses in the UK so that these once loved animals would not be tranported for days (many dieing en route) to meet their cruel destiny.
In my opinion an animal is an animal.
A cow, dog, horse, pig do not feel different emotions. I think it is wrong for a meat eater to say that they'd eat a cow, but not eat a horse/dog etc. because they have one for a pet.
I find it so frustrating that people think less of an animal because of it's destiny. I knew one person that saved a pig from slaughter, and it lived with her dogs on her livery yard. It acted like a dog! Loved cuddles and playing and it even interacted with the dogs. He was so sweet.
A horse bred for meat and a horse bred for pet purposes are no different. They both have the right to life, and the right to be loved.