First I have to say that a first aid kit is an excellent idea. However it needs some planning so it is available when needed. In the uk Neosporin/ polysporin is not available. My vet checked and there is an eye preparation with similar ingredients. Also the uk equivalent to silvadine is...
If he could see the colour red in his original position and didn't react it probably isn't the colour of the room. As Carol said it could be that he is not happy that his living area has been changed. Mine gets grumpy if I change a dead plant for a new one. Could the temp or humidity have...
Not too sure of the calcium spray. I would try to get a plain calcium without d3 for use daily. You can lightly dust with a powder but it would be difficult to measure what you are giving with a spray.:)