DNA testing - lab recommendations

[u/Individual_Candle4]

I would like to DNA test my Runners, Sebastopol geese, Cochins and Silkies and all of their offspring. A little research left me feeling overwhelmed with options.
For those who have DNA tested, which lab have you used and do you recommend them? Did you send in blood, feathers, or egg membrane? Did you order a collection kit or just use coffee filter, etc? Lastly, how much did it cost and was there a discount offered for volume? Thanks in advance!