Existing cats friendliness with new cats

Our cats are so used to new cats they are totally friendly and harmless... They don't even blink an eye when newcomers arrive!

And can sleep together like family members ^.^

Mother, Father and 2 kids. Just kidding!

Spot and Oliver the newcomers

Taken when we saw them lying together on their own accord ! Its within 5 days Oliver and Spot were first introduced before they got so comfortable with each other.

Of cos in the beginning things were not so perfect. Initially without fail there was hissing and scratching but gradually they got calmer as they make friends with more cats.. And it turned into more of endless sniffing when new cats are sighted... And now its like they don't even bother to sniff a new cat (O.o) Was able to unexpectedly achieve this after a long long while... Guess socialisation works wonder! It helps prevent a lot of unnecessary stress (=

So yea, we do think its very possible for cats to make friends just that they need some time. Just a matter of long or short depending on the cats (=