I saw this a few years ago and when i tell anyone they think i'm stupid. It had a panther's head and black pigs body, walked slow (like a pig) waddling its bottom. About the size of an adult pig, walking into a field, really casually despite me driving at it at 60mph, didn't look at me. I wasn't drunk, i've just stopped telling anyone now .
It could be a really chubby panther with a broken tail. Did it have trotters or paws? Do you live somewhere exotic where you're likely to come across a panther or such like? I've gotta admit, I haven't seen many around Oxford.
I am a huge believer in the Paranormalan! I can't help you on this one paticularly but go to this website.
Use Google. Mystical Animals at dowse!
Go to Gareth's Long Encyclopedia of Mythical animals in the Mythical animal section and see if you can find it.
WARNING: IT HAS OVER ABOUT 200 ANIMALS SO THIS COULD TAKE AGES!! I WILL HELP YOU SEARCH FOR IT AND I WILL REPLY SOME TIME!
The most likely thing for starts is that it ouldn't be a real type of animal we know about...yet. I was checking up for ya and I think i found otu what you saw.
A PANTHEON. A panther's head with boarish like hooves!
I'll find more info for you and post you back!