2yo Ds has chicken pox including in his mouth so he's really struggling to eat and drink. I'm not too worried about food but I'm really concerned about dehydration. He's only had about half a cup of milk today. I've tried water, milk, juice and smoothies so far in a variety of cups and beakers but he just cries advertises them.
How can I get some fluids into him, its not sunny but very warm so he really needs to drink.