changing dog food

Putting Iza onto barking heads bad hair day dry food. Looks the best for her diet to help her in case she has allergies, got 2kg bag the now but bigger bags would save me money. If she doesnt eat it straight away do i take it away and give her it back till she does eat it. Tried in past to change think it was natures diet but she goes on strike after a couple days and i feel guilty if she doesnt eat and go back to old stuff.
Obviously i dont want to buy 12kg of the stuff if it will go to waste. So do i stick with it cause have to change old stuff just in case.
http://www.amazon.co.uk/Barking-Heads-Bad-Hair-Lamb/dp/B00481BJNE/ref=dp_ob_title_pet
£9 in pets at home just now

I would always test out with a small bag so as not to waste money. They can be fussy at times but I've never known a Staffy to starve just because they don't fancy the change.

My Flo tends to get bored with the huge bags so we go for the medium and swap flavours around.

i will eat it at that price ha ha

Just think of the shiny coat you'll have Col

Might grow my hair back

oh col the things we do for our dogs eh . bless ya iza