Why won't my bearded dragons eat?

I have two female dragons aged 1 and they havnt ate for 3 weeks and it is starting to worry me they have salad in there changed every 2 days and I try to hand feed them worms, crickets and locusts daily but they are not eating. I bath the 3 times a day and they drink but don't eat. I have my temps at: Tank 85-90 basking spot 100-110 and I have the Acadia D3 UV Bulb. Also there tank is 4 foot. Any suggestions?