Hi, I tried to translate this but I think I have it wrong so could someone please translate it for me, thank you for your time in advance

hızlı giden atın boku seyrek olur dikkatli ol))))

 The shit of the horse that goes fast becomes/falls scattered. Be careful.

It doesnt mean if you do a job quickly you will be more succesful, it will be only lame.

Thanks,

Well I nearly got the translation right but I didnt understand the meaning so thank you for that. )