Here's the link to Dr. Foster and Smith, where I order Wellness, but it looks like they only service the US.

http://www.drsfostersmith.com/

As to buying what you can afford, you just gotta know your own dog and what'll work for them. It was actually more expensive for me to feed Purina One then Wellness, because of Maddie's food allergies, my vet bills went down on Wellness. I have a friend however, whose JRT continually throws up on any of the expensive brands, so for her the cheaper stuff works better.

Par...