Kata

maybe that's because I'm not native, but this sentence seems incorrect to me, considering the task:

If the dog has not be vaccianted or wormed, the dog can not be accepted.

I feel like this is more appropriate:

If the dog has been neither vaccianted nor wormed, the dog can not be accepted.

Ruby :

-for a 7 kyu, having no starting code is a bit harsh for beginners -with out access to the class code, a beginner isn't going to easily know what are the types of the attributes

Great Kata. Voted 6kyu for the following reasons:

1. Simple instructions (mainly if/else statements for beginners and a compound ternary statement for experienced programmers) so about 7kyu difficulty
2. Complex programming concepts such as editing prototypes which makes it a bit too challenging for 7kyu programmers --> therefore 6kyu

Keep it up! :D

.this is totally a hint

Nice kata! Translated into ruby and CoffeeScript for your review and approval.

FWIW, at the time I did the translation, the average difficulty rating for this kata was too low. Object-oriented is at least level 6. Re-opening a class (or extending an existing prototype) is generally harder than creating a new class, however this kata is really nicely written as an entry level task for the concept, so would likely stay at level 6.