Why? Because it's April fools day (this is also the same reasons all of your horses are now dragons)

Words because I'm curious

M a r e- mare

B r o o d- brood

S t a l l I o n- stallion

S t u d- stud

A r t- art

A r t i s t- artist

f o a l- foal

s t r a ws- straws

if there are any more, feel free to add them

S t a b l e - stable

This could be very confusing lol. Someone saying "ISO some b r o o d s" will be read "ISO some hoes" and could freak people out lol. I think it's funny though.