The antibiotics could be affecting the smell, color, and wateriness, of her pooh some too. If she's doing better, then you're on the right path. Yes, let her eat, and drink as much as she will, on her own.
She should have a waterer, or water dish and be able to drink as much as she wants. Same thing with food. Yes, scrambled egg, or anything else she'll eat, is good for her now.
1 and 1/4 tablet of the antibiotic daily. Yes, wait a couple hours after you give the calcium to give the antibiotic. Feel to see if you can feel an egg, that is bound.
I had already guessed she would be more in the 4 lb. range. I accounted for some weight loss. You can actually go up to 1 tablet in the morning, and 1/4 tablet in the evening, every day. When you go to put the pill into her mouth, tilt her head back just a little. If you haven't already, get...
Most pharmacies, and (especially) Wal Mart will usually give you a small dosage syringe if you ask for it. Most feed stores have them for a very small price too. Rinse it out with clear warm water after each use.
If you need to know how to dose with a dosage syringe: Facing the chicken, put the tip of the dosage syringe on the left side, towards the back, and put the liquid in slowly. If the mouth gets full, allow the chicken to swallow, and continue until it's taken the full dose. DO NOT get liquid in...
Ok, I've checked other threads. It's ok to give the whole 250 mg tablet per day. Again, crush it up and either mix with water, and give in a dosage syringe, or put as much as possible in/on a small bit of food, and let her eat it.
If you have a pill splitter, split it into 4 sections, like cutting a pie. If you don't have a pill splitter, use a knife, and score (cut a line) into a cross shape on the top of the pill. Once it's scored a little, then use the knife to cut the pill into the 4 sections. Press straight down...
I posted this before: https://jedds.com/products/tylosin-powder
Call the local pet stores that sell fish, and ask them. The feed stores often carry an injectable one, BUT I've extracted the correct dose, then added a bit more water. The injectable tastes terrible to them, is too strong and...
Here's a link for a good antibiotic. https://jedds.com/products/tylosin-powder
Mix it as directed, and pour into an empty waterer, or whatever you're using for water for the affected chicken. Be sure to mix it fresh daily. This package of powdered antibiotic will last a long time, so be sure...