i have tried the wizzlers.... my dogs love them but they do not last long at all. They are very thin, sorta like beef jerky but crunchier... but they are BIG tho.. so for one yorkie they might last longer (i have 3 dogs). Also they are easy to rip apart.
I have not tried the other products but i do love Merricks...
I see your in O.C...... I used to live in Irvine and i worked at a doggy boutique called Dogma! in irvine. They carry many of Merricks treats.
Dogma!