We've also got an issue where Felix is eating most of his food and then he goes and eats from the other bowl. We try and stop him but he is sneaky. Because she doesn't come out when we give the food out it's hard to know how much she is eating. He is much bigger than she is.
Is there anyway we can try and seperate feeding. Have no idea what to do.
We have the same problem with our two cats. One is an eating machine and will eat his and his brothers food if we let him. The other just eats a bit.
At feeding time, you could leave Puddle in a room on her own with her food bowl and shut the door. Check in from time to time to see if she has eaten any (she probably will if nobody is around). Then slowly start getting her accustomed to feeding times in general, and also with Felix.
We supervise our cats breakfast time and when the one who does not eat a lot is finished, we put his bowl in the pantry so the other one can't get at it until his brother comes back in for a 'top-up'. Dinner time is not a problem because they both wolf the lot down
You could just pick her up and put her in front of her food along with the other cat in front of his and supervise them with the doors closed. If she walks away or tries to escape pick her up again and put her in front of her food again. Keep doing that till she gets the message.
Likewise if the other one tries to eat out of her bowl, pick him up and put him in front of his own, with a firm word or two, or exclude him completely once he is finished.
We tend to feed ours at the same time instead of just leaving food lying around. This means we can monitor them both at meal times but it also reduces the risk of other cats coming in to steal food.
It also helps to have an audiable cue to signify meal time as your cats will associate with it quite well. All we have to do is pick up the bag of cat biscuits and they will both come running if they are anywhere in the house. Try and think of something that will happen every meal time, and when they hear it, they will come. We chose the biscuit bag because it gets used at every meal time and we can also shake it with the door open and entice them into the house if they are outside being stubbourn
Are your cats siblings? Does Felix pick on Puddle? Once she knows that she is not going to get hurt at feeding time she should start to become more comfortable with it. As much as I loathe messing with cats generating their 'pecking order' around the house, sometimes I feel it is best to intervene if one cat is getting bullied and is clearly afraid to enjoy their surroundings or to the point that they are not eating properly. Also keep an eye on her water intake. If they are on wet food that should not be a problem, but if you use dry food only she will become dehydrated very quickly if she is not drinking and that will certainly effect her health.
The hiding under the bed stage should pass. When she does come out, it can be good to reinforce it with a big fuss and maybe a treat so that she starts to associate her wider surroundings with good things.
She will get there, it just takes a little time.