wad a costly "chicken"

there is this shop named Mummy at Capitol Centre.. i dun really remember the full name la.. it's got a red signboard. it sells similar food like Old Chang Kee, in stalks, just that they have varieties like Unagi and Cheese Sausages. Sounds good eh? They even sell Cup Corn, Tricia and I will always buy to eat in class. Ytd, we decided to try out the hotdog.. and when we are going to pay, to our SURPRISE, it costs $2.30 each!!! Eh hem.. no cheese inside ok.. i juz asked the lady to cut for me and poured abit of chilli to make it look abit nicer. imagine without slicing, it is juz A SAUSAGE. A normal CHICKEN sausage!! -__-" din taste so great at all!! Tricia was saying is the chicken imported from Japan? How come so EX! =___=" as compared.. they sell $1 for a chicken wing. How come the price difference? No idea!!!

**Qn: from the pic, is this a sausage or hotdog?
what's the diff between sausage and hotdog?
and do Japanese rear chickens??