We picked up two kittens from the shelter to foster today. They are roughly 3 and 4weeks old. The youngest is doing fine drinking kitten formula out of a saucer and eating some wet food. But Penny has only eaten .7 on the bottle formula. Her eyes are runny but it's clear and she's congested, sneezing. I think she has a uri. She has peed and pooped but won't eat, hasn't eaten sine 7 pm and it's almost 3 am now. Should I make her take the bottle?