2 pound poodle puppy has cold and infection?

Stay in close contact with your vet, until she feels better. Why not make her home made "chicken soup for dogs"? Make a broth with chicken bouillon, and boil raw chicken and rice in it? Make it sort of thick, so eating it will not be hard for her. Make sure the chicken pieces are small enough for her to eat. I use that for my dogs when they are not feeling up to par. Maybe a can/box of chicken broth would be also good with the rice and chicken. Boiling the raw chicken in the broth/rice mix holds the value of the chicken in the soup/food. It is easy on her tummy, and gives her much needed nutrition. Ask your vet--I'm pretty sure this will be very good for her! It will also insulate her tummy from the antibiotics. It is good nutrition and easy on a small stomach!