ok!! Thank you all guys!!
Amity thanks for the advice, I will have them in mind if I order from zooplus. I want to get a wooden wheel but this couple of months I've expended a lot of money with him, so I need to hit the brake a little bit.
Cypher, then, let's see what happens when he tries them. He is a little bit picky, so maybe he will throw the three flavours to my face
Anyway they were pretty cheap (and compared with the greenies they are ridiculously cheap) and my friend's dog is in queue for them so, nothing to worry about.