About a month ago I vaccinated my 2 years old female quail against salmonella and newcastle disease. Ever since, there's been a reduction in the number of eggs she lays (used to be each day) and they are deformed - soft shell, brown, the size of a fingernail. It's the first time I've ever seen her laying such eggs, and am worried it might have something to do with either of the vaccinations she's got (see picture). Apart from that she seems like her usual self, alert playful eating and drinking regularly. I make sure to provide her with layer's mixture alongside grit and cuttlefish bone. Have you ever experienced such a phenomeon? Your advise as to the cause and treament of it all will be appreciated!