Hi:
I've been looking at problems you are having with Muffin, and I have some ideas to run by you that could be of benefit. The move has sure been a traumatic experience for him and basically it's going to take a lot of time and TLC to get him back to some sort of normality, and another move in about four months will not help the matter too much either.
First, the cats have been separated from you for a period of 2 weeks while you moved. Then they are in strange surroundings, even though you are there. Cats are creatures of habit and familiar things - just move a chair or some other object and see what they do. So these compound everything.
We've been through the move bit 3 times in 4 years, so we know some of the stresses that they can go through. ( 5 cats).
I would be setting up safe rooms both in the new apartment and the new house when it comes time to move. It's just a small room that would contain the litter box, some food and water and bedding, to house the cats while the movers are moving and setting up the furniture. In this way the cats will be in a closed room sheltered from the activity and are less apt totake flight and runaway.
Right now I'd be looking at a product called Feliway it's a feline synthetic pheromones, that is said to help reduce stress in cats. It comes in either a spray or a plug-in, and from what I understand from some people they've had good results with it. It might be worth a try. Here's a website to have a look at.
http://www.feliway.com/us I haven't used the product, so I can't give you my opinion. Maybe someone else who is using the product will give their opinion.
Something else that will help relieve stress is Rescue Remedy. I have used it when I take my animals to the vet, and out in the car. It will not remove motion sickness, but it does take the edge off the stress of travel, and if it doesn't work for the cats you can always take it yourself. It does take the ragged edge off the stress. Here's the website to have a look at.
http://www.bachflower.com/Pets.htm.
Now for the spot on Muffins leg. Not wanting to stress him out by taking him to the vet I would be awfully tempted to use a product called Colloidal Silver over the sore spot. It has the ability to act as an antifungal, antibacterial and a antivirus, and it won't affect any other medications, and the neat thing is, that it can be used internally as well as externally. I would be looking for a strength of something that would be around 10 ppm. so that it can be used in the eyes and ears if required, and it's really great for taking the sting out of cat scratches and burn out of insect bites. I have used a lot of it over the years, and have had good success with it. It has a myriad of uses. Apply it with a wet gauze about six times a day to the red spot on the leg. Here's another website have look at.
http://www.ehow.com/about_5369874_co...lver-cats.html
If the spot doesn't improve in a few days, I would be taking the cat to the vet.
Keep us all up to date with your progress.