If they are sex-linked chicks they should all be pullets if they came from a reliable breeder/hatchery. I believe that Golden (or Gold) sex-linked chickens are usually a cross between Rhode Island Reds (or New Hampshires) and White Leghorns. The cockerels would be a different color than the...
Welcome to the site! Sorry to hear about your losses. Hear is a link to a discussion about diagnosing diseases/problems with chickens. I hope this helps you find the answer:
https://www.backyardchickens.com/threads/links-to-disease-symptoms-and-information.8818/
I don't think you need to start over. I think you could run a small trench around the coop/run and direct the water away from the coop/run. Use the soil from the trench to berm up the floor of the coop and run so any water that comes in runs away from the coop and into the trench. As a bonus you...
Chickens can be addictive so watch out! Your pullets look like Golden Comets which are some of my favorites! Great egg layers and friendly too! Congratulations and Welcome!
71% humidity should be fine but it depends on how the air sack in the egg has progressed. Here is a great article on humidity that explains more: https://www.backyardchickens.com/articles/incubation-humidity.73386/
Congratulations on the new arrivals! Golden Comets are great layers and quite friendly. They are among my favorites. As MiniBirdsMi said, you don't need grit if you are just feeding starter mash. I have never used purchased grit but my birds go outside at a young age and have access to...
This is what I have been using:
https://www.behr.com/consumer/products/wood-stains-finishes-cleaners-and-strippers/solid-color-wood-stains/behr-premium-solid-color-waterproofing-stain-and-sealer
It is a bit pricey but it has held up very well. We get plenty of snow and extreme temperatures...
I very much agree with the list from Cynthia12. The only breed I would add is the Rhode Island Red. It seems to be very popular in my area (Sanpete County). Welcome to the Utah group!
I have had Golden Comets, ISA Browns, and other sex-link hybrids in my flock for many years. They are amazing. I just wish the egg laying continued in the 2nd and 3rd generations after breeding.
Thank you! I guess I would have to use a different rooster to get other colors. When you bred the leghorn roosters with RIR hens did the hens lay pretty well?
Disclaimer: I am new to breeding so my knowledge is limited and my experience is non-existent.
I have had chickens for 10 years but have never done any chicken breeding. I want to start breeding chickens and selecting on egg production. My idea was to breed white leghorns because they are very...