Ferreting rats is a job ONLY for the experienced ferret and be warned, your pug will pick up injuries, maybe fatal ones. Be prepared to treat them immediately or your ferret will fail quickly. I used to ferret rats years ago and it's a brutal and hard way of life for the ferret. I lost a couple through injuries and in the end I came away from using them for ratting. Jill's become hardened and are useless at rabbiting, as they become so adept and quick, they more than often killed below and to handle were not always agreeable. I started using hobs to shift rats and they were more suited to it