My dogs have been on the Diamond Naturals Chicken and Rice, and the Diamond Naturals Extreme Athlete and have been doing very well for over a year now. Never tried the lamb though. I have fed the puppy and they did ok on that as well.
I have looked at pro-plan and for the price, dollar to dollar, pound to pound, ingredient to ingredient, I think diamond naturals has much better ingredients and knocks the socks off it price-wise.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC