YOU SAID:
two ponys walked around in the stables
INTO JAPANESE
2匹のポニーが厩舎を歩き回った
BACK INTO ENGLISH
Two ponies roamed the stables
INTO JAPANESE
2頭のポニーが厩舎を歩き回った
BACK INTO ENGLISH
Two ponies roamed the stables
That didn't even make that much sense in English.