BlueDingo said:
Anything with earth_pony on it will get the horse tag automatically so there's not much you can do about it besides blacklisting/excluding earth_pony.

And that sucks.

I do like MLP but I usually just want normal equines on this site but it's nearly impossible, even with using the negative tag, half of the results are still MLP.

MLP ponies should be considered their own species.