I realise that some people are very pro breast milk, but there are posts on here that almost border the 'ebil formula' and I just wanted to clarify that Pesticides like DDT and other chemicals like Flame retardants are found in Breast milk. If you live in a developed country, even out in the bush - chances are you are being exposed to chemicals, wether you like them or not, wether you eat only organic food or not.
Donor breastmilk just isn't viable for some people. There is no shame in that. Really we should have proper milk banks available like they do in Europe, until then - well most people would probably choose formula and that is ok. No one is making anyone else choose it.