Thank you, I think I have a solution, not sure if it is perfect but seems to work without having to play with all sorts of code.
In the back office, multishop, group second shop.
I set up a second URL under my shop.
First URL of second shop : sapphirepets.co.nz as main URL.
Then second URL www.sapphirepets.co.nz (making sure not to have this one in ssl as paypal does not like that).
Noting my first shop www.petseverywear.co.nz was set up with www and had no issues. The issues only happened with the second shop which kept redirecting to the first shop if i took off the www. until this work around.
So chrome seems happy.
What do you think?