All of this behavior is normal and to be expected. You will want to be cautious when you enter the bathroom so he doesn't try to escape. I like to use a firm chair cushion to gently push the cat back if needed.
You might want to order some liquid Composure max or try the Composure treats. If I remember Izzy only eats dry food and picky. So I doubt she would take the liquid, I also doubt she would take the treats, but it might be worth a try. They really help a cat to feel more calm. It might help Henry at night.
As suggested above, you might try feeding the two on either side of the closed door. If you watched the Jackson Galaxy video I posted awhile ago on introductions, he shows how to do this. I can repost the video if needed.
Unless he is really crying for long long periods, I would just allow him to cry. I know it's hard, but if you go in every time, he will just keep doing it.
The screen door is the next step. Just be sure you can get it nice and secure. I like to use a baby gate in the door way for a bit of extra protection since the screen is kind of flimsy.
Try not to freak out since this can be felt and noticed by both Izzy and Henry. If you are upset, then they too will be upset.
It will take months and months for them to all adjust. At some point you could try some room swapping by putting Izzy in the closed bathroom and allowing Henry some supervised time in your room. You just want to be careful that he doesn't get under the bed and you cannot get him out.
You might want to order some liquid Composure max or try the Composure treats. If I remember Izzy only eats dry food and picky. So I doubt she would take the liquid, I also doubt she would take the treats, but it might be worth a try. They really help a cat to feel more calm. It might help Henry at night.
As suggested above, you might try feeding the two on either side of the closed door. If you watched the Jackson Galaxy video I posted awhile ago on introductions, he shows how to do this. I can repost the video if needed.
Unless he is really crying for long long periods, I would just allow him to cry. I know it's hard, but if you go in every time, he will just keep doing it.
The screen door is the next step. Just be sure you can get it nice and secure. I like to use a baby gate in the door way for a bit of extra protection since the screen is kind of flimsy.
Try not to freak out since this can be felt and noticed by both Izzy and Henry. If you are upset, then they too will be upset.
It will take months and months for them to all adjust. At some point you could try some room swapping by putting Izzy in the closed bathroom and allowing Henry some supervised time in your room. You just want to be careful that he doesn't get under the bed and you cannot get him out.