I have a 3 year old frenchie who has been in freshpet for over a year or so. She always scooted and scratched herself and I’m wondering if she may be allergic to chicken and beef. She does not have any hot spots. Also, I’m transitioning her from freshpet to health extensions buffalo, whitefish and sweet potato recipe. She is drinking much more water than usual and is pooping a lot more than usual. Today is day 4. The first 2 days I gave her 75% old food and 25% new days 3&4 50% old and 50% new. Days 6&7 will be 75% new and 25% old. My bet recommended purina pro plan or royal canon but the girl at the pet store suggested health extension because its healthier and doesn’t have beef or chicken. I want to make sure that im doing the right by my girl. Any thoughts or advice?? Thank you paige