For severe deficiencies, injectable is best to start.
There's no one 'best' feed, it depends on what's available and fresh where you can shop.
Here it's Purina Flock Raiser, 20% protein, and then separate oyster shell for actively laying hens. I have used a 18% to 20% protein chick feed if the...
Not great feed, for sure. And mixed whole grain feeds can be a real problem, if individuals decide to eat only certain items in the mix. Malnutrition is then very likely.
Buy a fresh all flock or chick feed, 20% protein, with separate oyster shell and separate grit. Pelleted or crumble, not...
Also, have you been checking the mill date on each bag of feed? It needs to be fresh! We feed within two months of the mill date here.
What are you feeding? An all-flock, layer, chick feed? Treats?
Lead poisoning? Marek's disease? head injury? At least she's better, however slight the...