I have a business on instagram @_tackinabox_
and I sell horse treats on there you should check it
Online one SmartPak or off any horse store
I sometimes make my own using malasos, oats, carrots, and apples
If your in NZ or Australia then @equinesweet.nz
on Instagram has amazing treats!
Slewschews.com has great horse treats but they are alittle on the expensive side. My horse loves there pony donuts.