For "hundene" you need to add that extra "ne" sound, to distinguish it from "hun", so 'the dogs' become "hund-ne".
For the sentence "Har hun en hund?" (Has she a dog = Does she have a dog?), the "hun" is much softer than "hund". There is more force in that you put extra pressure and say it quicker, where you'd drag out "hun" just a bit and make it more soft.
This is incorrect American English I can't guarantee about British English but in American English after being found you don't use the word find you use the word found this is an incorrect way of saying the dogs find you it sounds like you're asking if they found you instead of saying to the person that is found that they found you please fix