You and your DH are just wonderful
for taking in Casper (love the name
). He will adjust to being indoors, because it seems to me that this has been his campaign in your neighborhood. I am sure he is just SO relieved to be off of the streets and safe
. My Walden tried for weeks to run out the door. He learned and decided that the indoor life is much more pleasing to him and he is now satisfied to bird/squirrel/feral watch from the windows.
For litter, I have use Dr. Elsey's Precious Cat litter. It is not that expensive at all and hypoallergenic. It is about $14.00 for 40 pounds and is practically dust-free. You can add the additive (the herbal bottle from Dr. Elsey) to the Precious Cat litter. Cheaper than Cat Attract and same thing. The additive bottle last a long time and you don't need to add as much as the bottle says, IMO. Just take it real slow, as you know, with trying to introduce the cats. Do not rush it. And since Casper might only be with you for a few weeks, you might as well just keep him in his own room for the time being. Unless, of course, you fall in LOVE and can't let him go
. Either way, he is better off than he was before