Hi,
To become a veterinary surgeon you will have to do a degree, i think it takes 5-6 years. If you are thinking of becoming a veterinary nurse, it can be done in a number of different ways university/college at varying course lengths around 2-3 years. You could more than likely do a specific equine veterinary nurse course. If your main focus is on breeding maybe you could an equine science degree but you couldn't become a vet from just doing that. I Would look on the UCAS website for different course options, speak to some course leaders of courses you are interested in and maybe see if you can volunteer at some vets, speak to some vets to see what the reality of being a vet looks like and research exactly what you would like to achieve at the end of the course you choose.
Good luck
Victoria
-Wrexham Uni rep