welcom to the most addictive sport in the hunting world,i talked in another thread about myself hunting pigs with dog-n-knife runs in my family for generations its a big sport in hawaii....so to answer your question its realy up to you an your dogs hunting expierence an your budget on what knife an size you want to use.my gramps used a folding buck my father uses a modified machete(onterio 12"),my bro likes the coldsteel OSS,or recon scout,my hunting buds us busse,f.dick (stickers),fallkniven,an others but most of them use coldsteel machetes an the cheaper models in krupp steel i know alot of people dont like that brand here but for the price thats all i got to say about that,i use a barkriver gameskeeper 2 it has a 5-3/4"in blade,but i now use a koyote package a 13"boar hunter to cut trail an poke (we hunt in jungle terrian)its lashed to my pack an a 6"hunter/boner on my hip.if i hunt clear areas i just take the hunter/boner.i hunted almost 10 yrs strait with jus a kabar you dont need a zombi slayer but its up to you an what you feel comfortable with...aloha an good hunting,,,,dog-knife-4-life