(one's) (hand)writing is like chicken scratch

One's handwriting is very poor, messy, and/or illegible, likened to the marks made in the dirt by a chicken. I can't understand these notes at all, your handwriting is like chicken scratch!

Common Names:

Name	Pronounced	Usage
Akbar	['ækba:]
Kurtis	KUR-tis	English
Aurelius	[ɔ:'ri:jəs]
Charity	CHER-i-tee, CHAR-i-tee	English
Addie	AD-ee	English
Anara	-	Kazakh, Kyrgyz