Greetings
micstrachan,
Sorry to hear about your Ruby.
Colloidal Silver is very effective against E. Coli.
As you know, a dosage has not been established for Colloidal Silver use in chickens. So, I use the following.
- Colloidal Silver 1100 ppm, I use 5 drops, in a half gallon of water for hen to drink.
- Or, you can use a lower concentration of 20-30 pmm of Colloidal Silver and administer it without diluting. 2 drops or .1 mL, 2 times a day.
I have a hen, that was diagnosed with a tumor in early October 2018. The vet said she'd probably pass away by November. She stopped eating, drinking, and laying eggs. By end of October she became lame and was critically ill. I nursed her all Winter. I provided red light therapy/warmth of 68-70 degrees, daily. I also fed her a Hemp protein slurry, with coconut oil, Manuka honey, Ashwaghanda, and Liquid Hepato, 3-4 times a week. Colloidal Silver in the water when she was on a course of Doxycycline. Long story short, not only is she still alive, she is walking, running, jumping and laying eggs!
Was it the care she received, the red light therapy, the special herbs and supplements, or God's grace?

All I can say, is she's truly a miracle hen.
God's blessings of good health, for your hen.