I was doing the same thing! letting her listen to the other basenjis on you tube, and i tried yodelling myself to get her to do it…no luck! the only time i hear hre is when i crate her and leave the house. HOWEVER
I have been working very hard at teaching her... emphasis on VERY HARD WORK..... like months. I have a clicker, When i have a treat i know she REALLY wants (my chicken breast, liverwart or bruanshwager, good stuff)
I tell her to "speak" and she flips around and does all her other tricks and i tell her to relax.....
when they finally make a noise even if its VERY SMALL click and treat.... BE persistant she/he will figure it out... my girl looks like shes having an exorcisim (sorry i cant spell) every time i tell her but she knows what i mean now and sometimes she lets out a big funny noise..... its so worth it.... but it takes time just keep trying and after time youll see
i hold the treat UP HIGH and say in my high pitch " SPEAK, tell me come on" SPEAK ..... they dont know what your saying though... so just start clicking and treating and praiseingANY time you hear a noise.... even when she would yawn i would say "SPEAK" good girl! and praise her. she was very confused but got it eventually.
Ill video her tricks and post them on youtube tonight but there are already some there....
go to you tube and put in KIRO the basenji even though they arent up to date .....