Basically it seems that after adding 3 pets to my house, it put a strain on loading extra people/animals, not sure why. Loading into the house takes less time than clicking the house to see the members inside it!
I first tried taking all downloads out and clicked the house, and it took about 5 secs to come up, all other houses I click have no waiting time to show the household members.
I put the downloads back and I clicked the house and thought I'd just wait it out and go and do something else to see if its just taking long to load the house members (the music still plays in the background) and about 3-5 mins later I returned back to my computer and it had loaded members, so I suppose its just a strain of loading the 5 sims and 3 pets.
Hopefully this topic comes of help to anyone who ends up with the same problem, as I couldn't seem to find anyone else who had the same problem and had solved it.
Thanks for the help Miss.