I have a 2 year old RIR who has been laying brittle eggs for a few months. I have tried extra oyster shells, shrimp shells, egg shells and yogurt but have had no luck. I found liquid calcium at the hardware store where I buy feed, but it is labeled for tomatoes. Is it safe to dilute it and put it in her water? The product is Ferti-Lome Yield Booster (http://www.fertilome.com/ProductFiles/FL Yield Booster MSDS_1.pdf). Thank you!!