My favorite blow reed cow call is the Primo's Lead Cow/Calf call. It is a bite type call pretty easy to use and has decent range. Another to consider would be the Hootchie Mama Push call, limited in sounds but seems to work pretty good on singles or cow/calf pairs. The bonus is extremely easy to use.....just push! I use both these calls as well as mouth calls when making herd talk and have done pretty well.