When I create a pet horse, it will not follow me if I move away from it.

If I move really far away, it will start to follow, but stop while still far away

build 342 of echopet
spigot 1360

change your pets follow settings. I think the defaults are something like follow at 16 and stop at 8.

yea this looks further to me :/ http://gyazo.com/05086f1b33c33c8b993b6b5791ab6fba.png

That value is not measured in blocks.