
If I were interviewing you I would like to see knowledge of:
the local laws relating to dog ownership
the local council in general
where most people take their dogs
where to recommend dog walkers go, safe places for offlead romps etc
breeds and their characteristics
how to break up fights and attacks
how to deal with people; if you said you preferred dogs to people I wouldn't be interested
DDA and the country code
local training clubs and if you had any relationship with them
KC good citizen dog scheme and listed training club status
Good luck with the interview. If you're preparing like this I'm sure you will do really well.